Proverbs 20:19 in the World English Bible
He who goes about as a tale-bearer reveals secrets; therefore don’t keep company with him who opens wide his lips.
Context
18 Every purpose is established by counsel: and with good advice make war.
19 He that goeth about as a talebearer revealeth secrets: therefore meddle not with him that flattereth with his lips.
20 Whoso curseth his father or his mother, his lamp shall be put out in obscure darkness.