Proverbs 9:7 (BSB)

He who corrects a mocker brings shame on himself; he who rebukes a wicked man taints himself.

From Proverbs 9. Also in the ESV.

Commentary on Proverbs 9:7

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Proverbs 9:1-12: Wisdom is here introduced as a magnificent and munificent queen, very great and very generous; that Word of God is this Wisdom in which God makes known his goodwill towards men; God the Word is this Wisdom, to whom the Father has committed all judgment.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Proverbs 9:7: He that reproveth a scorner getteth to himself shame,.... Intimating, that though the simple, and such as want understanding, and of whom there is hope of doing them good, are to be invited into Wisdom's house; yet not the haughty scorner, the abandoned sinner, the scoffer at all religion, who walks after his own lusts, and is quite irreclaimable; it is but casting pearls before...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Proverbs 9:7: shame--(Compare Pro 3:35). a blot--or, "stain on character." Both terms denote the evil done by others to one whose faithfulness secures a wise man's love.
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Proverbs 9:7: He that reproveth a scorner getteth to himself shame: and he that rebuketh a wicked [man getteth] himself a blot. (g) For the wicked will contemn him and labour to defame him.