The Apostle Paul
1 Thessalonians 4:6BSB·traditional attribution

and no one should ever violate or exploit his brother in this regard, because the Lord will avenge all such acts, as we have already told you and solemnly warned you.

John Calvin Reformed @genevareformer

6 Let no man oppress. Here we have another exhortation, which flows, like a stream, from the doctrine of sanctification. “God,” says he, “has it in view to sanctify us, that no man may do injury to his brother.” For as to Chrysostom’s connecting this statement with the preceding one, and explaining ὑπερβαίνειν καὶ πλεονεκτεῖν to mean — neighing after the wives of others, (Jeremiah...

Matthew Henry Presbyterian @wholebiblehenry

Here we have, I. An exhortation to abound in holiness, to abound more and more in that which is good, Th1 4:1, Th1 4:2. We may observe, 1. The manner in which the exhortation is given - very affectionately. The apostle entreats them as brethren; he calls them so, and loved them as such.

Commenting on 1 Thessalonians 4:1-8

John Gill Reformed Baptist @doctorgill

That no man go beyond, and defraud his brother in any matter,.... Or "in this matter", as the Syriac version. This is commonly understood of transgressing the bounds of justice and equity between men and men; and of cheating and defrauding in trade and business, by increasing or lessening the value and prices of goods by the buyer and seller, by not keeping to the...