Proverbs 17:3-5

Complete Jewish Bible

³ The crucible [tests] silver, and the furnace [tests] gold,
    but the one who tests hearts is Adonai.

⁴ An evildoer heeds wicked lips;
    a liar listens to destructive talk.

⁵ He who mocks the poor insults his maker;
    he who rejoices at calamity will not go unpunished.