'New Song' in the Bible

and they sing a new song, saying - Worthy, art thou, to take the scroll and to open the seals thereof; because thou wast slain, and didst redeem unto God by thy blood men out of every tribe, and tongue, and people, and nation,

And they sing as it were a new song before the throne, and before the four living creatures and the elders. And, no one, was able to learn the song, save the hundred and forty-four thousand, who had been redeemed from the earth.