And that no man might buy or sell, except he that had the mark, or the name of the beast, or the number of his name.
All Commentaries on Revelation 13:17 Go To Revelation 13
Bede
AD 735
buy: By this mention of buying and selling, he teaches, that as the Church has delivered the Creed for good, to be profitable to our salvation; so they for evil confine themselves within such a definition as this, that there be licence given neither of buying, nor of selling, even as merchants who sail in the same ship, are bound by a uniform signal.