This revelation of the prophet’s reward is so foreign to us as westerners that it almost repulses us. Jews, who were doing everything by Jewish customs, wrote the Bible. We are westerners and we don’t understand God very well because we do not understand the Jews.
In bible times people from the east understood hospitality and how to show honor to people of authority that came into thier city. They understand how to receive prophets and other fivefold ministers. So that they could receive the prophets reward.