1 Samuel 16

1 Samuel 16:23

You, a man of the church, ought to be better instructed by the music of the church than by Pythagoras. Think what David's lyre did for Saul, who was harassed by an evil spirit but recovered from this disturbance when the holy man played his lyre; beware of thinking the concupiscence of the flesh is a good merely because it is sometimes checked by musical sounds. — AGAINST JULIAN 5.5.23