'New Song' in the Bible

And they sung a new song, saying, Worthy art thou to take the book, and to open the seals thereon; because thou hast been slaughtered, and hast redeemed us for God by thy blood, out of every tribe, and tongue, and people, and nation;

and they sang as it were a new song before the throne, and before the four living beings, and the presbyters: and no person could learn that song, but the hundred forty-four thousand, who were redeemed from the earth.