Revelation 13:16-18

Diaglott(i) 16 And hew causes all, the little ones and the great ones, and the rich ones and the poor ones, and the freedom and the bondmen, that they should give to them a mark on the hand of them the right, or on the forehead of them; 17 and that no one may be able to buy or to sell, if not the one having the mark, the name of the wild-beast, or the number of the name of him. 18 Here the wisdom is; the one having a mind, let him compute the number of the wild-beast; a number for of a man it is, and the number of him six hundred and sixty-six.