neither cast ye your pearls before swine. But since the subject Christ is upon is reproof, it seems rather to be the design of these expressions, that men should be cautious, and prudent, in rebuking and admonishing such persons for their sins, in whom there is no appearance or hope of success; yea, where there is danger of sustaining loss;
lest they trample them under their feet, and turn again and rend you: that is, despise the admonitions and reproofs given, and hurt the persons who give them, either by words or deeds; see
Pro_9:7. The Jews have some sayings much like these, and will serve to illustrate them
John Gill