Proverbs 21:6
21:6 A fortune made by a lying tongue [similar to the “fraud” mentioned in 20:17] is a fleeting vapor and a deadly snare [lying destroys character].

Proverbs 21:13

21:13 [cf. Ex. 22:25-27] If a man shuts his ears to the cry of the poor, he too will cry out and not be answered.

Proverbs 21:19-20
21:19 [cf. Prov. 19:13; 25:24] Better to live in a desert [better to live isolated in a wilderness] than with a quarrelsome [nagging or contentious] and ill-tempered [hot-tempered] wife.

21:20 [the wise plan for the future] In the house of the wise are stores of choice food and oil [signs of stability and prosperity], but a foolish man devours all he has.