Abdur-Rahman bin Abi Bakrah reported on the authority of his father that he wrote to his son: The Messenger of Allah ﷺ said: A judge should not decide between the two while he is in anger.
Hadith ReferenceSunan Abi Dawud / The Office of the Judge (Kitab Al-Aqdiyah) / Hadith: 3589
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري (7158) صحيح مسلم (1717)