Ecclesiastes 10:11 in the World English Bible
If the snake bites before it is charmed, then is there no profit for the charmer’s tongue.
Context
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.