Revelation 13:12
12 And he exercises all the authority of the first beast in his presence. And he makes the earth and those who dwell in it to worship the first beast, whose fatal wound was healed.
Revelation 13:16 - 13:17
16 And he causes all, the small and the great, and the rich and the poor, and the free men and the slaves, that they be given a mark on their right hand or on their forehead, 17 and that no one will be able to buy or to sell, except the one who has the mark, either the name of the beast or the number of his name.