John Chrysostom

"I adjure you by the Lord that this Epistle be read unto all the holy brethren." And this command is rather from love, and not so much in the way of teaching; that with them also, he means, I may be conversing. And he does not merely command, but adjures them, and this from a fervent mind, that even though they should despise him, for the sake of the adjuration they may practice what is commanded. For men had a great dread of that appeal, but now that too is trampled under foot.

Homily on 1 Thessalonians 11 ↗

Theophylact of Ohrid

Not so much for the sake of instruction, as for the sake of conversing with them through the epistle: a proof of ardent love. And he adjures them so that if they do not respect him, then at least for the sake of the oath they would fulfill what had been commanded to them. So fearful were adjurations for the early Christians! But alas, they are not such now, they are not such for us.

Commentary on 1 Thessalonians ↗

Thomas Aquinas

I adjure you by the Lord that this letter be read to all the brethren. Paul feared that those in charge of the assembly might suppress it because of some of the things contained in it. "The people curse him who holds back grain, but a blessing is on the head of him who sells it" (Prov. 11:26).

Commentary on 1 Thessalonians ↗