Proverbs Chapter 15, Verse 2
From BibleWiki
2: The tongue of the wise useth knowledge aright: but the mouth
of fools poureth out foolishness.
2: The tongue of the wise adorneth knowledge: but the mouth of fools
bubbleth out folly.
2: The tongue of the wise knows what is good: but the mouth of the foolish tells out evil things.
Proverbs Chapter 15, Verse 2/commentary

