The God of peace will soon crush Satan under your feet. The grace of our Lord Jesus Christ be with you.
20. What follows, God shall bruise Satan, etc., is a promise to confirm them, rather than a prayer. He indeed exhorts them to fight manfully against Satan, and promises that they should shortly be victorious. He was indeed once conquered by Christ, but not in such a way but that he renews the war continually. He then promises ultimate defeat, which does not appear in the midst of the contest.
The apostle having endeavoured by his endearing salutations to unite them together, it was not improper to subjoin a caution to take heed of those whose principles and practices were destructive to Christian love. And we may observe, I. The caution itself, which is given in the most obliging manner that could be: I beseech you, brethren.
Commenting on Romans 16:17-20
Timotheus my work fellow,.... Now follow the salutations of the friends and companions of the apostle: we may imagine that when this epistle was just concluding, that these his friends being about him, one said, pray send my Christian salutation to our dear friends at Rome, so said a second, and likewise a third, and so on, and Timotheus he began.