'New Song' in the Bible

And they sung a new song, saying, Thou art worthy to take the book, and to open the seals of it: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and language, and people, and nation;

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 four thousand, who were redeemed from the earth.