Revelation 13:17

17andκαὶthatἵναnoμήoneτιςshould be ableδύνηταιto buyἀγοράσαιorἢto sellπωλῆσαιifεἰnotμὴthe [one]ὁhavingἔχωνtheτὸmarkχάραγμα,theτὸnameὄνομαof theτοῦbeastθηρίουorἢtheτὸνnumberἀριθμὸνof theτοῦnameὀνόματοςof itαὐτοῦ.

and that no one may be able to buy or to sell, except the one having the mark—the name of the beast or the number of its name.