The Apostle Paul
Ephesians 4:28ESV·traditional attribution

Let the thief no longer steal, but rather let him labor, doing honest work with his own hands, so that he may have something to share with anyone in need.

John Calvin Reformed @genevareformer

28. Let him that stole steal no more. This includes not merely the grosser thefts which are punished by human laws, but those of a more concealed nature, which do not fall under the cognizance of men, — every kind of depredation by which we seize the property of others. But he does not simply forbid us to take that property in an unjust or unlawful manner.

Matthew Henry Presbyterian @wholebiblehenry

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.

Commenting on Ephesians 4:17-32

John Gill Reformed Baptist @doctorgill

Let all bitterness,.... These words are a dehortation from several vices good men are liable to, by which the Spirit of God is grieved: "bitterness" sometimes designs the corruption of nature, which is the gall of bitterness, and bond of iniquity; and sometimes actual sins and transgressions, even those of God's own people, which are evil and bitter things; and sometimes heretical doctrines, which are...