Revelation 14:1-5

And I saw, and behold, the Lamb standing upon mount Zion, and with him a hundred and forty-four thousand, having his name and the name of his Father written upon their foreheads. And 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; and 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. These 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 God and to the Lamb: and in their mouths was no lie found; for they are blameless.