Proverbs 26:9
“As a thorn goeth up into the hand of a drunkard, so is a parable in the mouth of fools.”
The legs of the lame are not equal: so is a parable in the mouth of fools.
As he that bindeth a stone in a sling, so is he that giveth honour to a fool.
As a thorn goeth up into the hand of a drunkard, so is a parable in the mouth of fools.
The great God that formed all things both rewardeth the fool, and rewardeth transgressors.
As a dog returneth to his vomit, so a fool returneth to his folly.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“The legs of the lame are not equal: so is a parable in the mouth of fools.”
“Speak not in the ears of a fool: for he will despise the wisdom of thy words.”
“He that sendeth a message by the hand of a fool cutteth off the feet, and drinketh damage.”
“As a dog returneth to his vomit, so a fool returneth to his folly.”
“The tongue of the wise useth knowledge aright: but the mouth of fools poureth out foolishness.”