(123) بَابُ الْعَفْوِ وَالصَّفْحِ عَنِ النَّاسِ
Ibn 'Abbas reported that the Messenger of Allah, may Allah blesshim and grant him peace, said, "Teach and make things easy and not difficult.When one of you is angry, he should be silent."
Reference: Al-Adab Al-Mufrad 245
In-book reference: Book 12, Hadith 8
English translation: Book 12, Hadith 245