And he stripped off his clothes also, and prophesied before Samuel in like manner, and lay down naked all that day and all that night. Therefore they say, Is Saul also among the prophets?
All Commentaries on 1 Samuel 19:24 Go To 1 Samuel 19
Augustine of Hippo
AD 430
For all who do not love God are strangers, are antichrists. And though they come to the churches, they cannot be numbered among the children of God. That fountain of life does not belong to them. To have baptism is possible even for a bad person; to prophesy is possible even for a bad person. We find that king Saul prophesied: he was persecuting holy David, yet he was filled with the spirit of prophecy and began to prophesy.