10 When they came to the hill there , behold , a group of prophets met him; and the Spirit of God came upon him mightily , so that he prophesied among them. 11 It came about, when all who knew him previously saw that he prophesied now with the prophets , that the people said to one another , "What has happened to the son of Kish ? Is Saul also among the prophets ?" 12 A man there e said , "Now, who is their father ?" Therefore e it became a proverb : " Is Saul also among the prophets ?"
Matthew Henry's Commentary on 1 Samuel 10:10-12
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.