Proverbs 14:17; Proverbs 14:29; Proverbs 15:18

17 A quick-tempered person does foolish things, and the one who devises evil schemes is hated.
29 Whoever is patient has great understanding, but one who is quick-tempered displays folly.
18 A hot-tempered person stirs up conflict, but the one who is patient calms a quarrel.