Revelation 14:3

“And they sang a new song before the throne and before the four living creatures and the elders. And no one could learn the song except the 144,000 who had been redeemed from the earth.”

“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.”

“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.”