Proverbs 15:2
The tongue of the wise commends knowledge, but the mouth of the fool spouts folly.

Job 13:5
If only you would be silent; for that would be your wisdom!

Ecclesiastes 5:3
As a dream comes through many cares, so the speech of a fool comes with many words.

Ecclesiastes 10:3, 14
Even as the fool walks along the road, his sense is lacking, and he shows everyone that he is a fool. . . .