Revelation 14:1-5

I saw—it took my breath away!—the Lamb standing on Mount Zion, 144,000 standing there with him, his Name and the Name of his Father inscribed on their foreheads. And I heard a voice out of Heaven, the sound like rapids, like the crash of thunder. And then I heard music, harp music and the harpists singing a new song before the Throne and the Four Animals and the Elders. Only the 144,000 could learn to sing the song. They were bought from earth, lived without compromise, virgin-fresh before God. Wherever the Lamb went, they followed. They were bought from humankind, firstfruits of the harvest for God and the Lamb. Not a false word in their mouths. A perfect offering.