Narrated Ibn `Abbas:
`Umar asked the people regarding Allah's Statement: 'When comes the Help of Allah (to you O Muhammad against your enemies) and the conquest of Mecca.' (110.1) They replied, "It indicates the future conquest of towns and palaces (by Muslims)." `Umar said, "What do you say about it, O Ibn `Abbas?" I replied, "(This Surat) indicates the termination of the life of Muhammad. Through it he was informed of the nearness of his death."
USC-MSA web (English) reference: Vol. 6, Book 60, Hadith 493
Arabic reference: Book 65, Hadith 4969