Regarding suppressing anger
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، عَنْ إِبْرَاهِيمَ التَّيْمِيِّ، عَنِ الْحَارِثِ بْنِ سُوَيْدٍ، عَنْ عَبْدِ اللَّهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَا تَعُدُّونَ الصُّرَعَةَ فِيكُمْ " . قَالُوا الَّذِي لاَ يَصْرَعُهُ الرِّجَالُ . قَالَ " لاَ وَلَكِنَّهُ الَّذِي يَمْلِكُ نَفْسَهُ عِنْدَ الْغَضَبِ " .
`Abd Allah (b. Mas`ud) reported the Messenger of Allah (ﷺ) as saying: Whom do you consider a wrestler among you? The people replied: (the man) whom the men cannot defeat in wrestling. He said: No, it is he who controls himself when he is angry.