Revelation 13:17-18

Wycliffe Bible

¹⁷ that no man may buy, either sell, but they have the character, either the name of the beast, either the number of his name. [that no man may buy, or sell, no but he that hath the character, or his name, or the number of his name.]

¹⁸ Here is wisdom; he that hath understanding, acount the number of the beast; for it is the number of man, and his number is six hundred sixty and six.