Ephesians 4:32 (BSB)

Be kind and tenderhearted to one another, forgiving each other just as in Christ God forgave you.

From Ephesians 4. Also in the ESV.

Commentary on Ephesians 4:32

• John Calvin (Reformed), Calvin's Commentaries on Ephesians 4:32: 32. And be ye kind one to another. With bitterness he contrasts kindness, or gentleness of countenance, language, and manners. And as this virtue will never reign in us, unless attended by compassion, (ουμπάθεια,) he recommends to us to be tender-hearted This will lead us not only to sympathize with the distresses of our brethren, as if they were our own, but to cultivate that...
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Ephesians 4:17-32: The apostle having gone through his exhortation to mutual love, unity, and concord, in the foregoing verses, there follows in these an exhortation to Christian purity and holiness of heart and life, and that both more general (Eph 4:17-24) and in several particular instances, Eph 4:25-32.
• Albert Barnes (Presbyterian), Barnes' New Testament Notes on Ephesians 4:32: Verse 32. And be ye kind one to another. Benignant, mild, courteous, polite--χρηστοι. . Christianity produces true courteousness, or politeness. It does not make one rough, crabbed, sour; nor does it dispose its followers to violate the proper rules of social intercourse. The secret of true politeness is benevolence, or a desire to make others happy; and a Christian should be the most polite of men.
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Ephesians 4:32: (Luk 7:42; Col 3:12). even as--God hath shown Himself "kind, tender-hearted, and forgiving to you"; it is but just that you in turn shall be so to your fellow men, who have not erred against you in the degree that you have erred against God (Mat 18:33). God for Christ's sake--rather as Greek, "God in Christ" (Co2 5:19). It is in Christ that God vouchsafes forgiveness to us.