Musnad Ahmad 25:1342

Waki’ narrated to us, from Sufyan, from ‘Asim, from Abu Razin, from Ibn ‘Abbas, who said: "When {When the victory of Allah has come and the conquest} [An-Nasr: 1] was revealed, the Prophet (peace and blessings of Allah be upon him) knew that his death had been announced to him. So it was said: {When the victory of Allah has come} [An-Nasr: 1]—the entire Surah."