Revelation 14:2-5

2Then I heard a sound from heaven like the noise of raging water and the noise of loud thunder. The sound I heard was like the music played by harpists.

3They were singing a new song in front of the throne, the four living creatures, and the leaders. Only the 144,000 people who had been bought on earth could learn the song.

4These 144,000 virgins are pure. They follow the lamb wherever he goes. They were bought from among humanity as the first ones offered to God and to the lamb.

5They’ve never told a lie. They are blameless.