A companion asked the Messenger of Allah, peace and blessings be upon him, to advise him, so he advised him not to get angry. The companion who narrated this says: After hearing this instruction of the Messenger of Allah, peace and blessings be upon him, when I reflected, I realized that anger encompasses all evils.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 23171