New Revised Standard Version
The legs of a disabled person hang limp; so does a proverb in the mouth of a fool.

Contemporary English Version
A fool with words of wisdom is like an athlete with legs that can't move.

New American Bible
A proverb in the mouth of a fool hangs limp, like crippled legs.

Douay-Rheims Bible
As a lame man hath fair legs in vain: so a parable is unseemly in the mouth of fools.

As a lame man hath fair legs in vain: so a parable is unseemly in the mouth of fools.

not equal

Proverbs 26:9 As if a thorn should grow in the hand of a drunkard: so is a parable in the mouth of fools.

Proverbs 17:7 Eloquent words do not become a fool, nor lying lips a prince.

Psalm 50:16-21 But to the sinner God hath said: Why dost thou declare my justices, and take my covenant in thy mouth? . . .

Psalm 64:8 And their tongues against them are made weak. All that saw them were troubled;

Matthew 7:4,5 Or how sayest thou to thy brother: Let me cast the mote out of thy eye; and behold a beam is in thy own eye? . . .

Luke 4:23 And he said to them: Doubtless you will say to me this similitude: Physician, heal thyself. As great things as we have heard done in Capharnaum, do also here in thy own country.