Revelation 13:11, 14, 16-17

And I saw another beast coming up out of the earth; and he had two horns like unto a lamb, and he spake as a dragon.

And he deceiveth them that dwell on the earth by reason of the signs which it was given him to do in the sight of the beast; saying to them that dwell on the earth, that they should make an image to the beast who hath the stroke of the sword and lived.

And he causeth all, the small and the great, and the rich and the poor, and the free and the bond, that there be given them a mark on their right hand, or upon their forehead; and that no man should be able to buy or to sell, save he that hath the mark, even the name of the beast or the number of his name.