Character
لَيْسَ الشَّدِيدُ بِالصُّرَعَةِ، إِنَّمَا الشَّدِيدُ الَّذِي يَمْلِكُ نَفْسَهُ عِنْدَ الْغَضَبِ
Translation
The strong person is not the one who can overpower others. Rather, the strong person is the one who controls himself when he is angry.
Narrator
Abu Hurairah
Source
Sahih Bukhari & Muslim
Bukhari 6114, Muslim 2609