Proverbs 14:33
Wisdom rests in the heart of him who has understanding, but [a thing] in the inward part of fools is made known.
Proverbs 12:16
A fool's vexation is instantly known, but a prudent man conceals shame.
Proverbs 29:11
A fool utters all his anger, but a wise man keeps it back and calms it.
Proverbs 12:23
A prudent man conceals knowledge, but the heart of fools proclaims foolishness.
Proverbs 13:16
Every prudent man works with knowledge, but a fool flaunts folly.
Proverbs 15:2
The tongue of the wise utters knowledge rightly, but the mouth of fools pours out folly.
Proverbs 15:28
The heart of a righteous man meditates to answer, but the mouth of the wicked pours out evil things.
Ecclesiastes 10:3
Yea also, when the fool walks by the way, his understanding fails him, and he says to everyone [that] he is a fool.