Proverbs 14:29

14:29 The one who is slow to anger has great understanding,

but the one who has a quick temper exalts folly.

Proverbs 15:18

15:18 A quick-tempered person stirs up dissension,

but one who is slow to anger calms a quarrel.

Proverbs 16:32

16:32 Better to be slow to anger than to be a mighty warrior,

and one who controls his temper is better than one who captures a city.