Ecclesiastes 10:9-11

Darby Translation

⁹ Whoso removeth stones is hurt therewith; he that cleaveth wood is endangered thereby.

¹⁰ If the iron be blunt, and one do not whet the edge, then must he apply more strength; but wisdom is profitable to give success.

¹¹ If the serpent bite before enchantment, then the charmer hath no advantage.