Thematic Bible: The gathering home of the saints

And I heard a voice from heaven like the sound of great waters and like the rumbling of mighty thunder; the voice I heard [seemed like the music] of harpists accompanying themselves on their harps. And they sang a new song before the throne [of God] and before the four living creatures and before the elders [of the heavenly Sanhedrin]. No one could learn [to sing] that song except the 144,000 who had been ransomed (purchased, redeemed) from the earth.