Proverbs 17:3-5

New Revised Standard Version, Anglicised

³ The crucible is for silver, and the furnace is for gold,
    but the Lord tests the heart.
⁴ An evildoer listens to wicked lips;
    and a liar gives heed to a mischievous tongue.
⁵ Those who mock the poor insult their Maker;
    those who are glad at calamity will not go unpunished.