Revelation 14:2-5

2And I heard a voice from heaven, like the sound of great waters and like the rumbling of mighty thunder; and the voice that I heard [seemed like music and] was like the sound of harpists playing on their harps.

3And they sang a new song before the throne [of God] and before the four living creatures and the elders; and no one could learn the song except the hundred and forty-four thousand who had been purchased (ransomed, redeemed) from the earth.

4These are the ones who have not been defiled [by relations] with women, for they are celibate. These are the ones who follow the Lamb wherever He goes. These have been purchased and redeemed from among men [of Israel] as the first fruits [sanctified and set apart for special service] for God and the Lamb.

5No lie was found in their mouth, for they are blameless (spotless, untainted, beyond reproach).