Allah himself narrates about Isra in the Holy Quran as follows,
سُبْحَانَ الَّذِي أَسْرَىٰ بِعَبْدِهِ لَيْلًا مِّنَ الْمَسْجِدِ الْحَرَامِ إِلَى الْمَسْجِدِ الْأَقْصَى الَّذِي بَارَكْنَا حَوْلَهُ لِنُرِيَهُ مِنْ آيَاتِنَا ۚ إِنَّهُ هُوَ السَّمِيعُ الْبَصِيرُ
Glory to ((Allah)) Who did take His servant for a Journey by night from the Sacred
mosque to the farthest
mosque, whose precincts We did bless,- in order that We might show him some of Our Signs: for He is the One Who heareth and seeth (all things). [Qura'an Surah 'Isra 17:1]
This miraculous journey is described in various Hadiths Narrated Malik bin Sasaa: The Prophet said, "While I was at the House in a state midway between sleep and wakefulness, (an angel recognized me) as the man lying between two men. A golden tray full of wisdom and belief was brought to me and my body was cut open from the throat to the lower part of the abdomen and then my abdomen was washed with Zam-zam water and (my heart was) filled with wisdom and belief. Al-
Buraq, a white animal, smaller than a mule and bigger than a donkey was brought to me and I set out with Gabriel. When I reached the nearest heaven. Gabriel said to the heaven gate-keeper, 'Open the gate.' The gatekeeper asked, 'Who is it?' He said, 'Gabriel.' The gate-keeper,' Who is accompanying you?' Gabriel said, 'Muhammad.' The gate-keeper said, 'Has he been called?' Gabriel said, 'Yes.' Then it was said, 'He is welcomed. What a wonderful visit his is!' Then I met Adam and greeted him and he said, 'You are welcomed O son and a Prophet.' Then we ascended to the second heaven. It was asked, 'Who is it?' Gabriel said, 'Gabriel.' It was said, 'Who is with you?' He said, 'Muhammad' It was asked, 'Has he been sent for?' He said, 'Yes.' It was said, 'He is welcomed. What a wonderful visit his is!" Then I met Jesus and Yahya (John) who said, 'You are welcomed, O brother and a Prophet.' Then we ascended to the third heaven. It was asked, 'Who is it?' Gabriel said, 'Gabriel.' It was asked, 'Who is with you? Gabriel said, 'Muhammad.' It was asked, 'Has he been sent for?' 'Yes,' said Gabriel. 'He is welcomed. What a wonderful visit his is!' (The Prophet added:). There I met Joseph and greeted him, and he replied, 'You are welcomed, O brother and a Prophet!' Then we ascended to the 4th heaven and again the same questions and answers were exchanged as in the previous heavens. There I met Idris and greeted him. He said, 'You are welcomed O brother and Prophet.' Then we ascended to the 5th heaven and again the same questions and answers were exchanged as in previous heavens. there I met and greeted Aaron who said, 'You are welcomed O brother and a Prophet". Then we ascended to the 6th heaven and again the same questions and answers were exchanged as in the previous heavens. There I met and greeted Moses who said, 'You are welcomed O brother and. a Prophet.' When I proceeded on, he started weeping and on being asked why he was weeping, he said, 'O Lord! Followers of this youth who was sent after me will enter Paradise in greater number than my followers.' Then we ascended to the seventh heaven and again the same questions and answers were exchanged as in the previous heavens. There I met and greeted Abraham who said, 'You are welcomed o son and a Prophet.' Then I was shown Al-Bait-al-Ma'mur (i.e. Allah's House). I asked Gabriel about it and he said, This is Al Bait-ul-Ma'mur where 70,000 angels perform prayers daily and when they leave they never return to it (but always a fresh batch comes into it daily).' Then I was shown Sidrat-ul-Muntaha (i.e. a tree in the seventh heaven) and I saw its Nabk fruits which resembled the clay jugs of Hajr (i.e. a town in Arabia), and its leaves were like the ears of elephants, and four rivers originated at its root, two of them were apparent and two were hidden. I asked Gabriel about those rivers and he said, 'The two hidden rivers are in Paradise, and the apparent ones are the Nile and the Euphrates.' Then fifty prayers were enjoined on me. I descended till I met Moses who asked me, 'What have you done?' I said, 'Fifty prayers have been enjoined on me.' He said, 'I know the people better than you, because I had the hardest experience to bring Bani Israel to obedience. Your followers cannot put up with such obligation. So, return to your Lord and request Him (to reduce the number of prayers.' I returned and requested Allah (for reduction) and He made it forty. I returned and (met Moses) and had a similar discussion, and then returned again to Allah for reduction and He made it thirty, then twenty, then ten, and then I came to Moses who repeated the same advice. Ultimately Allah reduced it to five. When I came to Moses again, he said, 'What have you done?' I said, 'Allah has made it five only.' He repeated the same advice but I said that I surrendered (to Allah's Final Order)'" Allah's Apostle was addressed by Allah, "I have decreed My Obligation and have reduced the burden on My slaves, and I shall reward a single good deed as if it were ten good deeds." (Sahih Bukhari book 54, Hadith 429)
In Sahih Muslim, its mentioned as,
It is narrated on the authority of Anas b. Malik that the Messenger of Allah (may peace be upon him) said: I was brought al-Buraq Who is an animal white and long, larger than a donkey but smaller than a mule, who would place his hoof a distance equal to the range of version. I mounted it and came to the Temple (Bait Maqdis in Jerusalem), then tethered it to the ring used by the prophets. I entered the mosque and prayed two rak'ahs in it, and then came out and Gabriel brought me a vessel of wine and a vessel of milk. I chose the milk, and Gabriel said: You have chosen the natural thing. Then he took me to heaven. Gabriel then asked the (gate of heaven) to be opened and he was asked who he was. He replied: Gabriel. He was again asked: Who is with you? He (Gabriel) said: Muhammad. It was said: Has he been sent for? Gabriel replied: He has indeed been sent for. And (the door of the heaven) was opened for us and lo! we saw Adam. He welcomed me and prayed for my good. Then we ascended to the second heaven. Gabriel (peace be upon him) (asked the door of heaven to be opened), and he was asked who he was. He answered: Gabriel; and was again asked: Who is with you? He replied: Muhammad. It was said: Has he been sent for? He replied: He has indeed been sent for. The gate was opened. When I entered 'Isa b. Maryam and Yahya b. Zakariya (peace be upon both of them), cousins from the maternal side. welcomed me and prayed for my good Then I was taken to the third heaven and Gabriel asked for the opening (of the door). He was asked: Who are you? He replied: Gabriel. He was (again) asked: Who is with you? He replied Muhammad (may peace be upon him). It was said: Has he been sent for? He replied He has indeed been sent for. (The gate) was opened for us and I saw Yusuf (peace of Allah be upon him) who had been given half of (world) beauty. He welcomed me prayed for my well-being. Then he ascended with us to the fourth heaven. Gabriel (peace be upon him) asked for the (gate) to be opened, and it was said: Who is he? He replied: Gabriel. It was (again) said: Who is with you? He said: Muhammad. It was said: Has he been sent for? He replied: He has indeed been sent for. The (gate) was opened for us, and lo! Idris was there. He welcomed me and prayed for my well-being (About him) Allah, the Exalted and the Glorious, has said:" We elevated him (Idris) to the exalted position" (Qur'an 19:57 وَرَفَعْنَاهُ مَكَانًا عَلِيًّا ). Then he ascended with us to the fifth heaven and Gabriel asked for the (gate) to be opened. It was said: Who is he? He replied Gabriel. It was (again) said: Who is with thee? He replied: Muhammad. It was said Has he been sent for? He replied: He has indeed been sent for. (The gate) was opened for us and then I was with Harun (Aaron-peace of Allah be upon him). He welcomed me prayed for my well-being. Then I was taken to the sixth heaven. Gabriel (peace be upon him) asked for the door to be opened. It was said: Who is he? He replied: Gabriel. It was said: Who is with thee? He replied: Muhammad. It was said: Has he been sent for? He replied: He has indeed been sent for. (The gate) was opened for us and there I was with Musa (Moses peace be upon him) He welcomed me and prayed for my well-being. Then I was taken up to the seventh heaven. Gabriel asked the (gate) to be opened. It was said: Who is he? He said: Gabriel It was said. Who is with thee? He replied: Muhammad (may peace be upon him.) It was said: Has he been sent for? He replied: He has indeed been sent for. (The gate) was opened for us and there I found Ibrahim (Abraham peace be upon him) reclining against the Bait-ul-Ma'mur and there enter into it seventy thousand angels every day, never to visit (this place) again. Then I was taken to Sidrat-ul-Muntaha whose leaves were like elephant ears and its fruit like big earthenware vessels. And when it was covered by the Command of Allah, it underwent such a change that none amongst the creation has the power to praise its beauty. Then Allah revealed to me a revelation and He made obligatory for me fifty prayers every day and night. Then I went down to Moses (peace be upon him) and he said: What has your Lord enjoined upon your Ummah? I said: Fifty prayers. He said: Return to thy Lord and beg for reduction (in the number of prayers), for your community shallnot be able to bear this burden. as I have put to test the children of Isra'il and tried them (and found them too weak to bear such a heavy burden). He (the Holy Prophet) said: I went back to my Lord and said: My Lord, make things lighter for my Ummah. (The Lord) reduced five prayers for me. I went down to Moses and said. (The Lord) reduced five (prayers) for me, He said: Verily thy Ummah shall not be able to bear this burden; return to thy Lord and ask Him to make things lighter. I then kept going back and forth between my Lord Blessed and Exalted and Moses, till He said: There are five prayers every day and night. O Muhammad, each being credited as ten, so that makes fifty prayers. He who intends to do a good deed and does not do it will have a good deed recorded for him; and if he does it, it will be recorded for him as ten; whereas he who intends to do an evil deed and does not do, it will not be recorded for him; and if he does it, only one evil deed will be recorded. I then came down and when I came to Moses and informed him, he said: Go back to thy Lord and ask Him to make things lighter. Upon this the Messenger of Allah remarked: I returned to my Lord until I felt ashamed before Him. ( Sahih Muslim Book no. 1, Hadith 309)
Anas b. Malik reported on the authority of Malik b. Sa sa', perhaps a person of his tribe, that the Prophet of Allah (may peace be upon him) said: I was near the House (i. e. Ka'bah) in a state between sleep and wakefulness when I heard someone say: He is the third among the two persons. Then he came to me and took me with him. Then a golden basin containing the water of Zamzam was brought to me and my heart was opened up to such and such (part). Qatada said: I asked him who was with me (i e. the narrator) and what he meant by such and such (part). He replied: (It means that it was opened) up to the lower part of his abdomen (Then the hadith continues): My heart was extracted and it was washed with the water of Zamzam and then it was restored in its original position, after which it was filled with faith and wisdom. I was then brought a white beast which is called al-Buraq, bigger than a donkey and smaller than a mule. Its stride was as long as the eye could reach. I was mounted on it, and then we went forth till we reached the lowest heaven. Gabriel asked for the (gate) to be opened, and it was said: Who is he? He replied: Gabriel. It was again said: Who is with thee? He replied: Muhammad (may peace be upon him). It was said: Has he been sent for? He (Gabriel) said: Yes. He (the Prophet) said: Then (the gate) was opened for us (and it was said): Welcome unto him! His is a blessed arrival. Then we came to Adam (peace be upon him). And he (the narrator) narrated the whole account of the hadith. (The Holy Prophet) observed that he met Jesus in the second heaven, Yahya (peace be on both of them) in the third heaven, Yusuf in the third,
idris in the fourth, Harun in the fifth (peace and blessings of Allah be upon them). Then we travelled on till we reached the sixth heaven and came to Moses (peace be upon him) and I greeted him and he said: Welcome unto righteous brother and righteous prophet. And when I passed (by him) he wept, and a voice was heard saying: What makes thee weep? He said: My Lord, he is a young man whom Thou hast sent after me (as a prophet) and his followers will enter Paradise in greater numbers than my followers. Then we travelled on till we reached the seventh heaven and I came to Ibrahim. He (the narrator) narrat- ed in this hadith that the Prophet of Allah (may peace be upon him) told that he saw four rivers which flowed from (the root of the lote-tree of the farthest limits): two manifest rivers and two hidden rivers. I said: ' Gabriel! what are these rivers? He replied: The two hidden rivers are the rivers of Paradise, and as regards the two manifest ones, they are the Nile and the Euphrates. Then the Bait-ul-Ma'mur was raised up to me. I said: O Gabriel! what is this? He replied: It is the Bait-ul-Ma'mur. Seventy thousand angels enter into it daily and, after they come out, they never return again. Two vessels were then brought to me. The first one contained wine and the second one contained milk, and both of them were placed before me. I chose milk. It was said: You did right. Allah will guide rightly through you your Ummah on the natural course. Then fifty prayers daily were made obligatory for me. And then he narrated the rest of the hadith to the end.
(Sahih Muslim Book no. 1, Hadith 314)
Salah was also made complusory at this occasion. Prophet Muhammad (peace be upon him) was also shown many scenes of Heaven and Hell as narrated in Hadiths
Narrated Anas ibn Malik: The Prophet (peace_be_upon_him) said: When I was taken up to heaven I passed by people who had
nails of copper and were scratching their faces and their breasts. I said: Who are these people, Gabriel? He replied: They are those who were given to back biting and who aspersed people's honour.
(Sunan Abu Dawud Book no. 41, Hadith no 4860)
The Miraculous event of 'Isra i.e. the journey from Masjid ul Haraam to Masjid ul Aqsa and Mairaj i.e. The acsension indicates the greatness of Prophet Muhammad (peace be upon Him). The main purpose of this Post is to refresh our Iman and to counteract the attacks of non-Muslims via our great and endless power of Imaan. Our Holy Book Quran is itself a great Miracle by Allah Subhanahu Wa ta'la. Lets recognise the main purpose of our creation rather than becoming puppets at the hands of Satan who is our vowed enemy.
May Allah guide us all to the true path...Ameen