We are not told the topic of the conversation. It may have been with reference to the people who attended the meal, explaining who they were and why they were significant (thereby preparing Saul for leadership in Israel). Whatever the topic, it would have been some kind of preparation for the events of the next day and Saul’s coming kingship.1
25 And when they came down from the high place into the city, a bed was spread for Saul on the roof, and he lay down to sleep.