Ezekiel 9:4

9:4 The Lord said to him, “Go through the city of Jerusalem and put a mark on the foreheads of the people who moan and groan over all the abominations practiced in it.”

Ezekiel 9:6

9:6 Old men, young men, young women, little children, and women – wipe them out! But do not touch anyone who has the mark. Begin at my sanctuary!” So they began with the elders who were at the front of the temple.

Revelation 14:9

14:9 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,

Revelation 14:11

14:11 And the smoke from their torture will go up forever and ever, and those who worship the beast and his image will have no rest day or night, along with anyone who receives the mark of his name.”