Ecclesiastes 10:12 in the World English Bible
The words of a wise man’s mouth are gracious; but a fool is swallowed by his own lips.
Context
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.
13 The beginning of the words of his mouth is foolishness: and the end of his talk is mischievous madness.