Revelation 13:16-18

New International Reader's Version

¹⁶ It also forced everyone to receive a mark on their right hand or on their forehead. People great or small, rich or poor, free or slave had to receive the mark. ¹⁷ They could not buy or sell anything unless they had the mark. The mark is the name of the beast or the number of its name.

¹⁸ This problem requires wisdom. Anyone who is wise should figure out what the beast’s number means. It is the number of a man. And that number is 666.