Ecclesiastes 10:9KJV

7I have seen servants upon horses, and princes walking as servants upon the earth.

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

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

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

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