Revelation 14:2: “And I” [John] “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:”

Revelation 14:3: “And 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, which were redeemed from the earth.”

Revelation 14:4: “These are they” [The 144,000/Servants of God] “which were not defiled with women; for they are virgins. These are they which follow the Lamb” [Christ] “whithersoever he goeth. These were redeemed from among men, being the firstfruits: unto God and to the Lamb.”

Revelation 14:5: “And in their mouth was found no guile: for they are without fault before the throne of God.”