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