What does Deuteronomy 2:9 mean?

Then the Lord said to me, 'Don’t bother the Moabites or start a fight with them, because I’m not giving you any of their land. I’ve given Ar to the descendants of Lot.' Deuteronomy 2:9 - Modern Text Bible

(God also told them to respect Moab’s territory, showing that not every land was meant for Israel.)