Ecclesiastes 10:8-10

King James Version

⁸ He that diggeth a pit shall fall into it; and whoso breaketh an hedge, a serpent shall bite him.

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.