29 Whoever is patient has great understanding, but one who is quick-tempered displays folly.

Read Proverbs 14:29 Using Other Translations

He that is slow to wrath is of great understanding: but he that is hasty of spirit exalteth folly.
Whoever is slow to anger has great understanding, but he who has a hasty temper exalts folly.
People with understanding control their anger; a hot temper shows great foolishness.