Revelation 14:2-5

2And I heard a voice out of the heaven as a voice of many waters, and as a voice of great thunder. And the voice which I heard [was] as of harp-singers harping with their harps;

3and they sing a new song before the throne, and before the four living creatures and the elders. And no one could learn that song save the hundred [and] forty-four thousand who were bought from the earth.

4These are they who have not been defiled with women, for they are virgins: these are they who follow the Lamb wheresoever it goes. These have been bought from men [as] first-fruits to 1God and to the Lamb:

5and in their mouths was no lie found; [for] they are blameless.