Saul was brave and overcame the enemy; but he would also follow his own
will and proved disobedient to the law of the Lord. Samuel therefore
said to him: Thy kingdom shall not continue, for the Lord has chosen a
man after his own heart to be ruler over his people. And the Lord said
to Samuel: Fill thy horn with oil and go to Bethlehem, and anoint David,
the youngest son of Jesse, to be king after Saul. And Samuel went and
anointed David, and the spirit of the Lord came upon him from that day.
But the spirit of the Lord departed from Saul, and an evil spirit from
the Lord troubled him. His servants brought David, because he was
skilful in playing the harp. When the evil spirit came upon Saul, David
played the harp before him, and it went well with Saul, and the evil
spirit departed from him. (1 Sam. 11-16.)