Ecclesiastes 10:10
King James Version
“If the iron be blunt, and he do not whet the edge, then must he put to more strength: but wisdom profitable to direct.”
Context
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.
12The words of a wise man’s mouth gracious; but the lips of a fool will swallow up himself.
13The beginning of the words of his mouth foolishness: and the end of his talk mischievous madness.