Sahih Muslim Book 001, Hadith Number 0314.

Chapter : Night journey of the Messenger of Allah (may peace be upon him) to Heaven and the prayer made obligatory.

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 Zam-Zam 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 Zam-Zam 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) narrated 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.