And Saul's servants said unto him, Behold now, an evil spirit from God troubles you.
All Commentaries on 1 Samuel 16:15 Go To 1 Samuel 16
Jerome
AD 420
Again, that you may be sure that God curbs the spirit of pride, recall how the good spirit of God departed from Saul and an evil spirit troubled him. Holy Writ says, “And an evil spirit of God troubled him,” a spirit from God. Does God, then, have an evil spirit? Not at all. God had withdrawn so that afterwards an evil spirit might trouble Saul. In that sense, the spirit of God is called evil. Finally, holy David, knowing that God could take away the spirit of princes, entreats him, “And do not take your holy spirit from me.”