It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Jibril (peace be upon him) came to me and said: 'Convey greetings of peace to Sayyiduna Umar (may Allah be pleased with him) and tell him: His pleasure is a judgement, and his anger is honour.'"
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12419