He repeats the injunctions, 1 Thessalonians 4:11-12. We command you. Hereby he puts to a test their obedience in general, which he had recognized, 2 Thessalonians 3:4.
Withdraw , [ stellesthai ] - to furl the sails: to steer clear of (cf. 2 Thessalonians 3:14). Some had given up labour, as though the Lord was immediately coming. He had enjoined mild censure of such in 1 Thessalonians 5:14, "Warn them that are unruly." Now that the mischief had become more confirmed, he enjoins stricter discipline-namely, withdrawal from their company (cf. 1 Corinthians 5:5; 1 Corinthians 5:11; 2 John 1:10-11); not a formal excommunication, such as was subsequently passed on more heinous offenders, as in 1 Corinthians 5:5; 1 Timothy 1:20.
Brother - professing Christian; for, in the case of unprofessing pagan, believers were not to be so strict (1 Corinthians 5:10-13).
Disorderly. Paul plainly would not have sanctioned the Order of Mendicant Friars, who reduce such a "disorderly," lazy life to a system. Call it not an Order, but a burden to the community [Bengel, alluding to the epibaresai, 2 Thessalonians 3:8, "be chargeable;" literally, be a burden].
The tradition - the instruction orally given by him to them (2 Thessalonians 3:10), and subsequently committed to writing (1 Thessalonians 4:11-12).
Which he received of us. B G read 'ye received.' 'Aleph (') A C Delta f, 'they received.'