Revelation 5:9-14

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;

Revelation 19:1-6

AND after these things I heard a loud sound as of a vast multitude in heaven, saying, Hallelujah: Salvation, and glory, and honour, and power be to the Lord our God:

Treasury of Scripture Knowledge

Summary

Praise ye the LORD: for it is good to sing praises unto our God; for it is pleasant; and praise is comely.

Bible References

And praise

Revelation 5:9
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;
Revelation 19:1
AND after these things I heard a loud sound as of a vast multitude in heaven, saying, Hallelujah: Salvation, and glory, and honour, and power be to the Lord our God: