مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3177
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: When [the scorah) "When there comes the Help of Allah (to you, O Muhammad (ﷺ) against your enemies) and the Conquest (of Makkah)" (an-Nasr 110:1) was revealed, the Prophet (ﷺ) realised that news of his (impending) death had been given to him.
Musnad Ahmad 3201Its isnad is hasan]