Proverbs 20:17

14 “Bad, bad,” says the buyer, but when he goes away, then he boasts. 15 There is gold and abundance of costly stones, but the lips of knowledge are a precious jewel. 16 Take a man’s garment when he has put up security for a stranger, and hold it in pledge when he puts up security for foreigners.

17 Bread gained by deceit is sweet to a man, but afterward his mouth will be full of gravel. 18 Plans are established by counsel; by wise guidance wage war. 19 Whoever goes about slandering reveals secrets; therefore do not associate with a simple babbler. 20 If one curses his father or his mother, his lamp will be put out in utter darkness.