Proverbs 13:3 in the World English Bible
He who guards his mouth guards his soul. One who opens wide his lips comes to ruin.
Context
2 A man shall eat good by the fruit of his mouth: but the soul of the transgressors shall eat violence.
3 He that keepeth his mouth keepeth his life: but he that openeth wide his lips shall have destruction.
4 The soul of the sluggard desireth, and hath nothing: but the soul of the diligent shall be made fat.