Ecclesiastes 10:9
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.
Ecclesiastes თავი 10