It happened, when the [evil] spirit from God was on Saul, that David took the harp, and played with his hand: so Saul was refreshed, and was well, and the evil spirit departed from him.
Now that shows you how far Saul has strayed from the Lord, and the things of the Lord, he would actually kill the prophet of God. Samuel realized this, "This guy is really gone off the deep end. Lord if he hears I'm going to go down and anoint another king, he's gonna kill me."