Proverbs 21:13

21:13 The one who shuts his ears to the cry of the poor,

he too will cry out and will not be answered.

Proverbs 25:18

25:18 Like a club or a sword or a sharp arrow,

so is the one who testifies against his neighbor as a false witness.

Proverbs 26:4

26:4 Do not answer a fool according to his folly,

lest you yourself also be like him.