Proverbs 26:7 in the World English Bible
Like the legs of the lame that hang loose, so is a parable in the mouth of fools.
Context
6 He that sendeth a message by the hand of a fool cutteth off the feet, and drinketh damage.
7 The legs of the lame are not equal: so is a parable in the mouth of fools.
8 As he that bindeth a stone in a sling, so is he that giveth honour to a fool.