Revelation 5:8

When he took the roll, the four animals and the twenty-four elders fell down before the Lamb, each with a harp and gold bowls full of incense, that is, of the prayers of God's people.

Revelation 14:2

And I heard a sound from heaven, like the sound of great waters, and loud peals of thunder. The sound I heard was like that of harpists playing on their harps.

Treasury of Scripture Knowledge

Summary

Praise the LORD with harp: sing unto him with the psaltery and an instrument of ten strings.

Bible References

Praise

Revelation 5:8
When he took the roll, the four animals and the twenty-four elders fell down before the Lamb, each with a harp and gold bowls full of incense, that is, of the prayers of God's people.
Revelation 14:2
And I heard a sound from heaven, like the sound of great waters, and loud peals of thunder. The sound I heard was like that of harpists playing on their harps.