Revelation 5:9-10

And they sung a new song, saying: Thou art worthy 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:

Revelation 14:3

And they sung a new song before the throne, and before the four living creatures, and the elders: and no one was able to learn the song, but the hundred and forty-four thousand that had been redeemed from the earth.

Treasury of Scripture Knowledge

Summary

I will sing a new song unto thee, O God: upon a psaltery and an instrument of ten strings will I sing praises unto thee.

Bible References

Sing a new

Revelation 5:9
And they sung a new song, saying: Thou art worthy 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:
Revelation 14:3
And they sung a new song before the throne, and before the four living creatures, and the elders: and no one was able to learn the song, but the hundred and forty-four thousand that had been redeemed from the earth.