Revelation 14:2-5

2And I heard a voice from heaven like the roar of rushing waters and the booming of loud thunder. The voice I heard was like harpists playing on their harps.

3And they are singing a new song before the throne and before the four living creatures and the elders; and no one is able to learn the song except the 144,000 who had been redeemed from the earth.

4These are the ones who have not defiled themselves with women, for they are virgins. These are the ones who follow the Lamb wherever He goes. These have been redeemed from among mankind as firstfruits for God and the Lamb.

5And in their mouth was found no lie—they are blameless.