Ecclesiastes 10:10-12

King James Version

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.

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

¹² The words of a wise man's mouth are gracious; but the lips of a fool will swallow up himself.