Psalms 18:4-7

Psalms 18:4-7. The sorrows of death compassed me, and the floods of ungodly men made me afraid. The sorrows of hell compassed me about: the snares of death prevented me. In my distress I called upon the LORD, and cried unto my God: he heard my voice out of his temple, and my cry came before him, even into his ears. Then the earth shook and trembled; the foundations also of the hills moved and were shaken, because he was wroth.

God was angry with Saul and with all David’s persecutors because they hunted that good man like a partridge upon the mountains. The prayer of the poor suppliant called down the anger of God upon his adversaries.