Proverbs 27:17-20

¹⁷Iron is sharpened by iron; so a man sharpeneth the countenance of his friend.

¹⁸Whoso keepeth the fig-tree shall eat the fruit thereof; and he that guardeth his master shall be honoured.

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

²⁰Sheol and destruction are insatiable; so the eyes of man are never satisfied.