Proverbs 27:21LXX

19As in water face to face, so the heart of man to man.

20Hell and destruction are never full; so the eyes of man are never satisfied.

21the fining pot for silver, and the furnace for gold; so a man to his praise.

22Though thou shouldest bray a fool in a mortar among wheat with a pestle, will not his foolishness depart from him.

23Be thou diligent to know the state of thy flocks, look well to thy herds.