Jamieson, Fausset and Brown on 1 Samuel 9:25-27

25-27. Samuel communed with Saul upon the top of the house--Saul was taken to lodge with the prophet for that night. Before retiring to rest, they communed on the flat roof of the house, the couch being laid there (Jos 2:6), when, doubtless, Samuel revealed the secret and described the peculiar duties of a monarch in a nation so related to the Divine King as Israel. Next morning early, Samuel roused his guest, and conveying him on his way towards the skirts of the city, sought, before parting, a private interview--the object of which is narrated in the next chapter.