'Forehead' in the Bible

They were told not to damage the grass of the earth, or any green plant or tree, but only those people who did not have the seal of God on their forehead.

And he requires everyone—small and great, rich and poor, free and slave—to be given a mark on his right hand or on his forehead,

And the third angel followed them, saying with a loud voice, If any man worship the beast and his image, and receive his mark in his forehead, or in his hand,

And upon her forehead was a name written, MYSTERY, BABYLON THE GREAT, THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH.

And I saw thrones, and they sat upon them, and judgment was given to them, and the souls of those who have been beheaded because of the testimony of Jesus, and because of the word of God, and who did not bow before the beast, nor his image, and did not receive the mark upon their forehead and upon their hand, and they did live and reign with Christ the thousand years;