Proverbs 17:28

Yea, a very fool, when he holdeth his tongue, is counted wise; and to have understanding, when he shutteth his lips.

Job 13:5

Would God ye kept your tongue, that ye might be taken for wise men!

Proverbs 15:2

A wise tongue commendeth knowledge; a foolish mouth babbleth out nothing but foolishness.

Ecclesiastes 5:3

For where much carefulness is, there are many dreams: and where many words are, there men may hear fools.

Ecclesiastes 10:3

A doting fool thinketh, that every man doth as foolishly as himself.

Ecclesiastes 10:14

A fool is so full of words, that a man cannot tell what end he shall make. Who will then warn him of it that shall follow after him?

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