Revelation 14:1-4

1And I looked, and, lo, a Lamb stood on the mount Zion, and with him an hundred and forty and four thousand, having his Father’s name written in their foreheads.

2And I heard a voice from heaven, as the voice of many waters, and as the voice of a great thunder: and I heard the voice of harpers harping with their harps:

3And they sung as it were a new song before the throne, and before the four beasts, and the elders: and no man could learn that song but the hundred and forty and four thousand, who were redeemed from the earth.

4These are they who were not defiled with women; for they are virgins. These are they who follow the Lamb wherever he goeth. These were redeemed from among men, being the firstfruits to God and to the Lamb.1