Revelation 13:16 in the King James Version
And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads:
Context
15 It was given to him to give breath to the image of the beast, that the image of the beast should both speak, and cause as many as wouldn’t worship the image of the beast to be killed.
16 He causes all, the small and the great, the rich and the poor, and the free and the slave, to be given marks on their right hands or on their foreheads;
17 and that no one would be able to buy or to sell unless he has that mark, which is the name of the beast or the number of his name.