Uthman bin 'Umar bin Fars عثمان بن عمر بن فارس · General Behavior (Kitab Al-Adab)

When Banu Quraizah capitulated agreeing to accept Sa’d’s judgement, the Prophet (ﷺ) sent a messenger to him. When he came riding on a white ass, the prophet (ﷺ) said: stand up to (show respect to) your chief, or he said : “to the best of you”. He came and sat beside the Messenger of Allah (May peace be upon him).