It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The strong and brave one is not the one who overcomes others; rather, the strong one is the one who controls himself at the time of anger."
Hadith Referenceالادب المفرد / كتاب الغضب / 1317
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه البخاري ، كتاب الأدب : 6114 و مسلم : 2609 و النسائي فى الكبرىٰ : 10154»