Jesus marks His own

Then I looked, and there was the Lamb, standing on Mount Zion, and with him were 144,000 who had his name and his Father’s name written on their foreheads. I heard a sound from heaven like the sound of cascading waters and like the rumbling of loud thunder. The sound I heard was like harpists playing on their harps. They sang a new song before the throne and before the four living creatures and the elders, but no one could learn the song except the 144,000 who had been redeemed from the earth. These are the ones who have not defiled themselves with women, since they remained virgins. These are the ones who follow the Lamb wherever he goes. They were redeemed from humanity as the firstfruits for God and the Lamb. No lie was found in their mouths; they are blameless.
(Revelation 14:1-5)

Those who trust in the LORD are like Mount Zion. It cannot be shaken; it remains forever.
(Psalm 125:1)

The dragon stood on the sand of the sea.
(Revelation 12:18)

“You are to make a pure gold medallion and engrave it, like the engraving of a seal: HOLY TO THE LORD...It will be on Aaron’s forehead so that Aaron may bear the guilt connected with the holy offerings that the Israelites consecrate as all their holy gifts. It is always to be on his forehead, so that they may find acceptance with the LORD.
(Exodus 28:36, 38)