'Mouth of Fools' in the Bible

The tongue of the wise uses knowledge aright: but the mouth of fools pours out foolishness.

The heart of him that has understanding seeks knowledge: but the mouth of fools feeds on foolishness.

The legs of the lame are not equal: so is a parable in the mouth of fools.

As a thorn goes up into the hand of a drunkard, so is a parable in the mouth of fools.