The distribution of the land of Canaan among the remaining tribes was carried out through a precise lottery system, strictly adhering to the original divine command. The primary focus of this event is the actual performance and method of the lottery itself, rather than the proportional division of land based on the population size of each tribe [מלבי״ם].
This method was employed to fulfill the instructions given through Moses. It emphasizes that the territory had to be divided exclusively by means of a lottery, serving as a direct fulfillment of God's command [מלבי״ם, ביאור שטיינזלץ].
The lottery was conducted for exactly nine and a half tribes. Specifying this precise number acts as an introduction to clarify why only these groups participated. It prepares the groundwork for explaining the absence of the remaining tribes, specifically those who had already received their inheritance across the Jordan River, as well as the unique status of the tribe of Levi [מלבי״ם, ביאור שטיינזלץ].