Revelation 13:17

“And that no man might buy or sell, etc.] Either in an ecclesiastical sense, as to, be in any church office, or perform any such service, to say Mass, hear confession, give absolution, sell pardons and indulgences, etc. or in a civil sense, as to trade, and exercise merchandise, and this was forbidden by several Popish councils and synods; the Lateran council, under Pope Alexander, decreed against the Waldenses and Albigenses, that no one should presume to retain or encourage them in their houses or countries, or “trade” with them; and the synod of Tours in France forbid any reception of heretics, or protection, and that any communion should be had with them “in buying and selling”, as Mr.…”

“And--So A, B, and Vulgate read. C, IRENÆUS, 316, Coptic, and Syriac omit it. might buy--Greek, "may be able to buy." the mark, or the name--Greek, "the mark (namely), the name of the beast." The mark may be, as in the case of the sealing of the saints in the forehead, not a visible mark, but symbolical of allegiance. So the sign of the cross in Popery. The Pope's interdict has often shut out the excommunicate from social and commercial intercourse. Under the final Antichrist this shall come to pass in its most violent form. number of his name--implying that the name has some numerical meaning.”

“And that no man might buy or sell - That is, this mighty power would claim jurisdiction over the traffic of the world, and endeavor to make it tributary to its own purposes. Compare Revelation 18:11-13, Revelation 18:17-19. This is represented by saying that no one might “buy or sell” except by its permission; and it is clear that where this power exists of determining who may “buy and sell,” there is absolute control over the wealth of the world. Save he that had the mark - To keep it all among its own friends; among those who showed allegiance to this power. Or the name of the beast - That is, the “mark” referred to was either the name of the beast, or the number of his name. The meaning…”

“mark: Rev 13:16 name: Rev 3:12, Rev 14:11, Rev 17:5, Rev 22:4 the number: Rev 13:18, Rev 15:2 Revelation 13:18”