13 as soon as ye are come into the city, ye shall straightway find him, before he goeth up to the high place to eat; for the people will not eat until he come, because he doth bless the sacrifice; [and] afterwards they eat that are bidden. Now therefore get you up; for at this time ye shall find him.
Matthew Henry's Commentary on 1 Samuel 9:13
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.