The Book of Prayers (Kitab Al-Salat)

Muslim :: Book 4 : Hadith 1771

It is reported on the authority of Abu Huraira that the Messenger of Allah (may peace be upon him) said: Get together. for I am going to recite one-third of the Qur'an before you. And those who could get together gathered there. Then the Apostle of Allah (may peace be upon him) came out and recited:" Say: He, Allah, is One." He then entered (his house). Some of us said to the others: Perhaps there has been some news from the heaven on account of which he has gone Inside (the house). The Apostle of Allah (may peace be upon him) again came out and said: I told you that I was going to recite one-third of the Qur'in; keep in mind, this (Surah Ikhlas) is equivalent to one-third of the Qur'an.