Revelation 13:17; Revelation 14:3; Revelation 19:12

Revelation 13:17

17 and he provides that no one will be able to buy or to sell, except the one who has the mark, either the name of the beast or the number of his name.

Revelation 14:3

3 And they sang a new song before the throne and before the four living creatures and the elders; and no one could learn the song except the one hundred and forty-four thousand who had been purchased from the earth.

Revelation 19:12

12 His eyes are a flame of fire, and on His head are many diadems; and He has a name written on Him which no one knows except Himself.