Hadith 975
Sayyiduna Ibn Mas'ud (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: "When any one of you becomes angry, let him say «أَعُوذُ بِاللّٰهِ مِنَ الشَّيْطَانِ الرَّجِيمِ», and his anger will go away."