'Mouth' in the Bible

Don't be rash with your mouth, and don't let your heart be hasty to utter anything before God; for God is in heaven, and you on earth. Therefore let your words be few.

Don't allow your mouth to lead you into sin. Don't protest before the messenger that this was a mistake. Why should God be angry at your voice, and destroy the work of your hands?

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

The words of a wise man's mouth are gracious; but a fool is swallowed by his own lips.

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