Ecclesiastes 10:10-12

¹⁰If the axe-head should fall off, then the man troubles his countenance, and he must put forth more strength: and in that case skill is of no advantage to a man.

¹¹If a serpent bite when there is no charmer's whisper, then there is no advantage to the charmer.

¹²The words of a wise mouth are gracious: but the lips of a fool will swallow him up.