Narrated Abu Bakrah (RA):
I heard Allah's Messenger (ﷺ) say, "No judge should give judgement between two people while he is angry."[Agreed upon]. (FR)
Reference (FR): Bulugh al-Maram 1401 (FR)
In-book reference (FR): Book 14, Hadith 5 (FR)
English translation (FR): Book 14, Hadith 1401 (FR)