(18) باب ذِكْرِ مَا يَنْبَغِي لِلْحَاكِمِ أَنْ يَجْتَنِبَهُ
It was narrated that 'Abdur-Rahman bin Abi Bakrah said:
"My father wrote to 'Ubaidullah bin Abi Bakrah - who was the judge of Sijistan - saying: 'Do not pass judgment between two people when you are angry, for I heard the Messenger of Allah [SAW] say: No one should pass judgment between two people when he is angry.'"
Reference: Sunan an-Nasa'i 5406
In-book reference: Book 49, Hadith 28
English translation: Vol. 6, Book 49, Hadith 5408