Revelation 13:16-18

Modern English Version

¹⁶ He causes all, both small and great, both rich and poor, both free and slave, to receive a mark on their right hand or on their forehead, ¹⁷ so that no one may buy or sell, except he who has the mark or the name of the beast or the number of his name.

¹⁸ Here is a call for wisdom: Let him who has understanding calculate the number of the beast. It is the number of a man. His number is six hundred and sixty-six.