Revelation 14:9, 11

Then another angel, a third one, followed them, saying with a loud voice, “Whoever worships the beast and his image and receives the mark [of the beast] on his forehead or on his hand

And the smoke of their torment ascends forever and ever; and they have no rest day and night—those who worship the beast and his image, and whoever receives the mark of his name.” [Is 34:10; Mark 9:48]