Ṣaḥīḥ al-Bukhārī

‘Abdullāh ibn ‘Abbās (may Allah be pleased with him) reported: ‘Umar (may Allah be pleased with him) used to make me sit with the elderly men who had fought in the Battle of Badr. Some of them did not like that and said to ‘Umar: "Why do you bring in this boy to sit with us while we have sons like him?" ‘Umar replied: "Because of his status, which you already know about." One day ‘Umar called me and made me sit in the gathering of those people; and I think that he called me just to show them.

‘Umar then asked them: "What do you say about the verse that says: {When there comes the help of Allah and the conquest} [Sūrat An-Nasr: 1]?" Some of them said: "We are ordered to praise Allah and ask for His forgiveness when He helps us and grants us victory." Some others kept quiet and said nothing. Thereupon, ‘Umar asked me: "Do you say the same, O Ibn ‘Abbās?" I replied: ‘No.’ He said: "What do you say then?" I replied: "That is a sign of the Messenger’s death, of which Allah informed him.

He says: O Muhammad, when there comes the help of Allah to you against your enemies and the Conquest of Makkah, which is a sign of your death, you should celebrate the praises of your Lord and ask for His forgiveness; verily, He is the One who accepts repentance." Upon that, ‘Umar said: "I do not know anything about it other than what you have said."