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