Revelation 14:2-3

And I heard a voice out of heaven, as the voice of many waters, and as a voice of a great thunder; and the voice which I heard was as of harpers harping on their harps.

Revelation 15:2-3

And I saw as it were a sea of glass mingled with fire, and them that gained the victory over the wild beast, and over his image, and over the number of his name, standing at the sea of glass, and having the harps of God.

Treasury of Scripture Knowledge

Summary

The singers went before, the players on instruments followed after; among them were the damsels playing with timbrels.

Bible References

The players

Revelation 14:2
And I heard a voice out of heaven, as the voice of many waters, and as a voice of a great thunder; and the voice which I heard was as of harpers harping on their harps.
Revelation 15:2
And I saw as it were a sea of glass mingled with fire, and them that gained the victory over the wild beast, and over his image, and over the number of his name, standing at the sea of glass, and having the harps of God.