'New Song' in the Bible

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

and they sung as it were a new song before the throne; and before the four living ones, and the elders: and none could learn the song, but the hundred and forty four thousand, who are redeemed from the earth.