Revelation 5:9
And they sang a new song [which went like this]: "You deserve to take the book and break the seals on it, for you were killed and, with your blood, you purchased people for God from every tribe and language and race and nation,
Ephesians 5:19
Speak to one another by using psalms, hymns and spiritual songs, singing and making music with your hearts to the Lord.
Colossians 3:16
You should let the message of Christ live in you abundantly [i.e., as individuals and collectively]. Use [much] wisdom in teaching and warning one another with psalms, hymns and spiritual songs, singing with favor [i.e., with thankfulness] in your hearts toward God.
Revelation 14:3
And they [i.e., the 144,000] were singing a new song in front of God's throne, and in front of the four living beings and the [twenty-four] elders. No one could learn [to sing] this song except the one hundred and forty-four thousand [See 7:4,9] who had been purchased from the earth.