Revelation 14:3-4 ASV

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 firstfruits unto God and unto the Lamb.