TSK · Revelation 13:17

He also caused everyone(small and great, rich and poor, free and slave) to obtain a mark on their right hand or on their forehead.

A third angel followed the first two, declaring in a loud voice:“If anyone worships the beast and his image, and takes the mark on his forehead or his hand,

Then I saw something like a sea of glass mixed with fire, and those who had conquered the beast and his image and the number of his name. They were standing by the sea of glass, holding harps given to them by God.

and they will see his face, and his name will be on their foreheads.