10 and they come in thither to the height, and lo, a band of prophets—to meet him, and prosper over him doth the Spirit of God, and he prophesieth in their midst. 11 And it cometh to pass, all his acquaintance heretofore, see, and lo, with prophets he hath prophesied, and the people say one unto another, 'What 'is' this hath happened to the son of Kish? is Saul also among the prophets?' 12 And a man thence answereth and saith, 'And who 'is' their father?' therefore it hath been for a simile, '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.