The Apostle Paul
2 Thessalonians 3:6BSB·traditional attribution

Now we command you, brothers, in the name of our Lord Jesus Christ, to keep away from any brother who leads an undisciplined life that is not in keeping with the tradition you received from us.

John Calvin Reformed @genevareformer

He now proceeds to the correcting of a particular fault. As there were some indolent, and at the same time curious and prattling persons, who, in order that they might scrape together a living at the expense of others, wandered about from house to house, he forbids that their indolence should be encouraged by indulgence, “Il defend aux Thessaloniciens d’entretenir par leur liberalite ou dissimulation...

Matthew Henry Presbyterian @wholebiblehenry

The apostle having commended their obedience for the time past, and mentioned his confidence in their obedience for the time to come, proceeds to give them commands and directions to some who were faulty, correcting some things that were amiss among them. Observe, The best society of Christians may have some faulty persons among them, and some things that ought to be reformed.

Commenting on 2 Thessalonians 3:6-15

John Gill Reformed Baptist @doctorgill

Now we command you, brethren,.... The apostle is now come to the main thing itself he has in view in this part of the epistle, which is to encourage a regard to the discipline of God's house; and to exhort this church to excommunicate, or remove from communion, all disorderly persons; and those who are to do this he points out, and calls upon, and...