'Forehead' in the Bible

Another angel, a third, followed them, saying with a great voice, "If anyone worships the beast and his image, and receives a mark on his forehead, or on his hand,

And on her forehead a name was written, "MYSTERY, BABYLON THE GREAT, THE MOTHER OF THE PROSTITUTES AND OF THE ABOMINATIONS OF THE EARTH."

I saw thrones, and they sat on them, and judgment was given to them. I saw the souls of those who had been beheaded for the testimony of Jesus, and for the word of God, and such as didn't worship the beast nor his image, and didn't receive the mark on their forehead and on their hand. They lived, and reigned with Christ for a thousand years.