God might manifest them, and that they might see that they themselves are beasts. 3:18
"Curse not the king, no not in thy thought; and curse not the rich in thy bedchamber: for a bird of the air shall carry the voice, and that which hath wings shall tell the matter. " 10:20
Don't curse the king or the rich.
Don't even think anything bad about a king, because a little bird might tell him about your bad thoughts.