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]. (PT)
Reference (PT): Bulugh al-Maram 1401 (PT)
In-book reference (PT): Book 14, Hadith 5 (PT)
English translation (PT): Book 14, Hadith 1401 (PT)