Ecclesiastes 10:9-13

⁹Whoso removeth stones shall be hurt therewith, and he that cleaveth wood shall be endangered thereby.

¹⁰If the iron be blunt, and one do not whet the edge, then must he put forth more strength; but an advantage for giving success hath wisdom.

¹¹If a serpent bite before he is charmed, then there is no advantage to the charmer.

¹²The words of a wise man's mouth are gracious; but the lips of a fool are his destruction.

¹³The beginning of the words of his mouth is folly, and the end of his talk is mischievous madness.