5 "When you arrive at Gibeah of God, where the garrison of the Philistines is located, you will meet a band of prophets coming down from the place of worship. They will be playing a harp, a tambourine, a flute, and a lyre, and they will be prophesying. 6 At that time the Spirit of the Lord will come powerfully upon you, and you will prophesy with them. You will be changed into a different person. 7 After these signs take place, do what must be done, for God is with you. 8 Then go down to Gilgal ahead of me. I will join you there to sacrifice burnt offerings and peace offerings. You must wait for seven days until I arrive and give you further instructions."
9 As Saul turned and started to leave, God gave him a new heart, and all Samuel's signs were fulfilled that day. 10 When Saul and his servant arrived at Gibeah, they saw a group of prophets coming toward them. Then the Spirit of God came powerfully upon Saul, and he, too, began to prophesy. 11 When those who knew Saul heard about it, they exclaimed, "What? Is even Saul a prophet? How did the son of Kish become a prophet?" 12 And one of those standing there said, "Can anyone become a prophet, no matter who his father is?" So that is the origin of the saying "Is even Saul a prophet?" 13 When Saul had finished prophesying, he went up to the place of worship.
Matthew Henry's Commentary on 1 Samuel 10:5-13
Commentary on 1 Samuel 10:1-8
(Read 1 Samuel 10:1-8)
The sacred anointing, then used, pointed at the great Messiah, or Anointed One, the King of the church, and High Priest of our profession, who was anointed with the oil of the Spirit, not by measure, but without measure, and above all the priests and princes of the Jewish church. For Saul's further satisfaction, Samuel gives him some signs which should come to pass the same day. The first place he directs him to, was the sepulchre of one of his ancestors; there he must be reminded of his own mortality, and now that he had a crown before him, must think of his grave, in which all his honour would be laid in the dust. From the time of Samuel there appears to have been schools, or places where pious young men were brought up in the knowledge of Divine things. Saul should find himself strongly moved to join with them, and should be turned into another man from what he had been. The Spirit of God changes men, wonderfully transforms them. Saul, by praising God in the communion of saints, became another man, but it may be questioned if he became a new man.
Commentary on 1 Samuel 10:9-16
(Read 1 Samuel 10:9-16)
The signs Samuel had given Saul, came to pass punctually; he found that God had given him another heart, another disposition of mind. Yet let not an outward show of devotion, and a sudden change for the present, be too much relied on; Saul among the prophets was Saul still. His being anointed was kept private. He leaves it to God to carry on his own work by Samuel, and sits still, to see how the matter will fall.