Hisham bin 'Urwa هشام بن عروة · The Chapters on Expiation

"The Messenger of Allah (ﷺ) heard a man taking an oath by his father and said: 'Do not make oaths by your forefathers. Whoever makes an oath by Allah, let him fulfill his oath, and if an oath is sworn for a person by Allah, let him accept it. Whoever is not content with Allah has nothing to do with Allah.'

"On the Day of the conquest of Makkah, he came with his father and he said: 'O Messenger of Allah, give my father a share of Hijrah.' He said: 'There is no Hijrah.' Then he went away and entered upon 'Abbas and said: 'Do you know who I am?' He said: 'Yes.' Then 'Abbas went out, wearing a shirt and no upper wrap, and said: 'O Messenger of Allah, do you know so-and-so with whom we have friendly ties? He…