The Book of Prayers (Kitab Al-Salat)

Muslim :: Book 4 : Hadith 1200

Abu Rafi' reported: I saw Abu Huraira performing prostration (while reciting this verse: )" When the heaven burst asunder." I said to him: Do you prostrate yourself (while reciting) i? He said: Yes, I saw my best Friend (may peace be upon him) prostrating himself on (the recital of this verse) and I shall continue prostrating till I meet him. Shu'ba asked: Do you mean (by Friend) the Apostle of Allah (may peace be upon him)? He said: Yes.