Revelation 13:15-18

Haweis(i) 15 And he is enabled to impart life to the image of the beast that even the image of the beast should speak, and cause as many as will not worship the image of the beast to be put to death. 16 And he causeth all the small and the great, the rich and the poor, the freemen and the slaves, to receive a brand upon their right hand, and upon their foreheads: 17 and that no man may buy or sell, but he that hath the mark impressed, or the name of the beast, or the number of his name. 18 Here is wisdom. Let him that hath understanding calculate the number of the beast: for it is the number of a man; and his number is six hundred sixty-six.