15 Now the day before Saul came, the word of God had come to Samuel, saying, 16 Tomorrow about this time I will send you a man from the land of Benjamin, and on him you are to put the holy oil, making him ruler over my people Israel, and he will make my people safe from the hands of the Philistines: for I have seen the sorrow of my people, whose cry has come up to me. 17 And when Samuel saw Saul, the Lord said to him, This is the man of whom I gave you word! he it is who is to have authority over my people.
Matthew Henry's Commentary on 1 Samuel 9:15-17
Commentary on 1 Samuel 9:11-17
(Read 1 Samuel 9:11-17)
The very maid-servants of the city could direct to the prophet. They had heard of the sacrifice, and could tell of the necessity for Samuel's presence. It is no small benefit to live in religious and holy places. And we should always be ready to help those who are seeking after God's prophets. Though God had, in displeasure, granted Israel's request for a king, yet he sends them a man to be captain over them, to save them out of the hand of the Philistines. He does it, listening graciously to their cry.