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