Revelation 14:2-4

American Standard Version

² And I heard a voice from heaven, as the voice of many waters, and as the voice of a great thunder: and the voice which I heard was as the voice of harpers harping with their harps: ³ and they sing as it were a new song before the throne, and before the four living creatures and the elders: and no man could learn the song save the hundred and forty and four thousand, even they that had been purchased out of the earth. ⁴ These are they that were not defiled with women; for they are virgins. These are they that follow the Lamb whithersoever he goeth. These were purchased from among men, to be the first-fruits unto God and unto the Lamb.