مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3329
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Abu Razeen that 'Umar asked Ibn ‘Abbas (رضي الله عنه) about this verse: “When there comes the Help of Allah (to you, O Muhammad (ﷺ) against your enemies) and the Conquest (of Makkah)" (an-Nasr 105:1). He said: When it was revealed, it was the announcement to the Prophet (ﷺ) of his own death.
Musnad Ahmad 3353Its isnad is hasan]