Revelation 13:14-18

Mace(i) 14 and he deceived the inhabitants of the earth, by the prodigys which he had power to effect by the influence of the beast, by telling the inhabitants of the earth, that he had made an image to the beast, which had the wound by a sword, but yet did revive. 15 he had power likewise to animate the image made for the beast, so that the image was made to speak, and as many as would not worship the image were order'd to be killed. 16 he likewise obliged all, both small and great, rich and poor, the freeman and the slave, to receive a mark in their right hand, or in their foreheads: and order'd, 17 that no body should buy or sell unless he had the mark, or the name of the beast, or the number of his name. 18 here is wisdom. let him that hath understanding count the number of the beast: for it is the number of a man; and his number is six hundred sixty six.