Cast out the scorner,.... That makes a mock at sin, a jest at religion, and scoffs at all good men, and everything serious and spiritual; cast such an one out of all company and conversation; out of the family, as mocking Ishmael was cast out of Abraham's family; and out of the church, and all religious societies. Jarchi interprets it of the evil imagination or corruption of nature; but this will continue with a man as long as he lives, and, though it may be weakened and subdued, it is not cast out;
and contention shall go out; yea, strife and reproach shall cease; which are caused by the scorner, who stirs up contention and strife in all company where he is, in families, and churches; and is continually casting reproach on good men and things; but, when he is cast out, everything of this nature ceases, and peace and love take place.

Profane scoffers and revilers disturb the peace.

Cast out--or drive away. Scorners foster strife by taunts and revilings.

10 Chase away the scorner, and contention goeth out,
And strife and reproach rest.
If in a company, a circle of friends, a society (lxx ἔκβαλε ἐκ συνεδρίου), a wicked man is found who (vid., the definition of לץ, Proverbs 21:24) treats religious questions without respect, moral questions in a frivolous way, serious things jestingly, and in his scornful spirit, his passion for witticism, his love of anecdote, places himself above the duty of showing reverence, veneration, and respect, there will arise ceaseless contentions and conflicts. Such a man one ought to chase away; then there will immediately go forth along with him dispeace (מדון), there will then be rest from strife and disgrace, viz., of the strife which such a one draws forth, and the disgrace which it brings on the society, and continually prepares for it. קלון is commonly understood of the injury, abuse, which others have to suffer from the scoffer, or also (thus Fleischer, Hitzig) of the opprobria of the contentious against one another. But קלון is not so used; it means always disgrace, as something that happens, an experience, vid., at Proverbs 18:3. The praise of one who is the direct contrast of a לץ is celebrated in the next verse.