15There is an abundance of gold and rubies, but lips of knowledge are a rare treasure.
16Take the garment of the one who posts security for a stranger; get collateral if it is for a foreigner.
17Food gained by fraud is sweet to a man, but later his mouth is full of gravel.
18Set plans by consultation, and wage war under sound guidance.
19He who reveals secrets is a constant gossip; avoid the one who babbles with his lips.