Proverbs 13:3
"He that keepeth his mouth keepeth his life: but he that openeth wide his lips shall have destruction."
Cross References (ranked by relevance)
Whoso keepeth his mouth and his tongue keepeth his soul from troubles.
Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.
A fool’s mouth is his destruction, and his lips are the snare of his soul.
I said, I will take heed to my ways, that I sin not with my tongue: I will keep my mouth with a bridle, while the wicked is before me.
He that goeth about as a talebearer revealeth secrets: therefore meddle not with him that flattereth with his lips.
In the multitude of words there wanteth not sin: but he that refraineth his lips is wise.
If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man’s religion is vain.
The wicked is snared by the transgression of his lips: but the just shall come out of trouble.