'Mouth' in the Bible

Be not rash with thy mouth, and let not thine heart be hasty to utter any thing before God: for God is in heaven, and thou upon earth: therefore let thy words be few.

Suffer not thy mouth to cause thy flesh to sin; neither say thou before the angel, that it was an error: wherefore should God be angry at thy voice, and destroy the work of thine hands?

All the labour of man is for his mouth, and yet the appetite is not filled.

The words of a wise man's mouth are gracious; but the lips of a fool will swallow up himself.

The beginning of the words of his mouth is foolishness: and the end of his talk is mischievous madness.