Proverbs 21:11-13

Complete Jewish Bible

¹¹ When a scorner is punished, the simple become wiser;
    and when the wise is instructed, he takes hold of knowledge.

¹² The Righteous One observes the house of the wicked;
    he overthrows the wicked to their ruin.
¹³ Whoever stops up his ears at the cry of the poor
    will himself cry, but not be answered.