Proverbs 17:2-4

Revised Standard Version

² A slave who deals wisely will rule over a son who acts shamefully,
    and will share the inheritance as one of the brothers.
³ The crucible is for silver, and the furnace is for gold,
    and the Lord tries hearts.
⁴ An evildoer listens to wicked lips;
    and a liar gives heed to a mischievous tongue.