'Harps' in the Bible

And I heard a voice out of the heaven as a voice of many waters, and as a voice of great thunder. And the voice which I heard was as of harp-singers harping with their harps;

And I saw as a glass sea, mingled with fire, and those that had gained the victory over the beast, and over its image, and over the number of its name, standing upon the glass sea, having harps of God.