Ecclesiastes 10:9-11

King James Version

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

¹⁰ If the iron be blunt, and he do not whet the edge, then must he put to more strength: but wisdom is profitable to direct.

¹¹ Surely the serpent will bite without enchantment; and a babbler is no better.