To the top of the house - “On the top.” The bed on which Saul slept was on the top of the house. It is very common in the East to provide extra sleeping accommodation by placing a tent or awning on the house-top.
Related Commentaries of 1 Samuel 9:26
1 Samuel 9:26
26 And they arose early: and it came to pass about the spring of the day, that Samuel called Saul to the top of the house, saying, Up, that I may send thee away. And Saul arose, and they went out both of them, he and Samuel, abroad.