Revelation 14:2-3

Diaglott(i) 2 And I heard a voice out of the heaven as a voice of waters many, as a voice of thunder great; and the voice which I heard, as of harpers harping on the harps of themselves. 3 And they sing a song new in presence of the throne, and in presence of the four living ones, and of the elders; and no one was able to learn the song, if not the hundred forty-four thousands, those having been bought from the earth.