Wondrous is the affair of the believer, for all of it is good. If ease comes to him he is thankful, and that is good for him. If hardship comes to him he is patient, and that is good for him.
Sahih Muslim 2999
Hadith
The strong is not the one who overcomes people by his strength, but the one who controls himself while in anger.
Sahih al-Bukhari 6114
Source: Sahih al-Bukhari 6114. Translations are given in plain English for reflection; please return to the original Arabic and to qualified scholarship for study.