Revelation 13:1, 6-8, 11-12, 15-18

Then I saw a wild beast rising from the sea with ten horns and seven heads. On its horns were ten royal crowns, and on its heads were blasphemous names.

So the wild beast began to blaspheme against God, blaspheming his holy name and his dwelling place; that is, those who dwell in heaven. The beast was given the authority to wage war against the holy believers. And he was given authority over every tribe, people, language, and nation. Everyone on earth will worship the wild beast—those whose names have not been written from the foundation of the world in the Book of the Life of the Lamb who was slain.

Then I saw another wild beast coming up from the ground. It had two horns like a ram, but it spoke like the dragon. It operated in all the authority of the first beast on its behalf, causing the earth and its inhabitants to worship the first beast, whose mortal wound had been healed.

The beast from the earth was empowered to breathe life into the image of the first beast so that it could speak and kill those who refused to worship its image. It also caused everyone, small and great, rich and poor, free and bound, to be marked on the right hand or on the forehead. This meant no one could buy or sell unless they had the mark; that is, the name of the beast or its number. This will require wisdom to understand: Let the one with insight interpret the number of the wild beast, for it is humanity’s number —666.