Revelation 13:16-17

And he causes all, both small and great, rich and poor, freemen and slaves, to receive the mark on their right hand, or on their foreheads;

Revelation 14:11

And the smoke of their torment ascends for ever and ever: and they have no rest, day nor night, who worship the beast, and his image; and whoever receives the mark of his name.

Treasury of Scripture Knowledge

Summary

And one shall say unto him, What are these wounds in thine hands? Then he shall answer, Those with which I was wounded in the house of my friends.

Bible References

What

Revelation 13:16
And he causes all, both small and great, rich and poor, freemen and slaves, to receive the mark on their right hand, or on their foreheads;
Revelation 14:11
And the smoke of their torment ascends for ever and ever: and they have no rest, day nor night, who worship the beast, and his image; and whoever receives the mark of his name.