Shared ground
Numbers 34:13–15 links the border description (34:1–12) to the practical question of distribution. The text presents the land as an inheritance to be assigned “by lot” under Moses’ instruction, and it treats that process as carrying out what Yahweh has commanded (explicit claim). It also clarifies that the lot-based assignment concerns “nine tribes and a half-tribe,” because Reuben, Gad, and half of Manasseh have already received their allotment (explicit claim). The passage assumes tribal identity and “fathers’ houses” as the basic social units for receiving and holding land (explicit claim).
Where interpretation differs
Some interpreters think “by lot” mainly describes the method of apportionment (a fair, non-negotiated process under God’s oversight). Others think it also highlights timing and scope: this lot-casting is specifically for the land west of the Jordan, because the eastern inheritance has already been settled (inference from the way v. 14–15 explain the exception).
A smaller question is how precise the location phrase is: “beyond the Jordan at Jericho eastward.” Some read “at Jericho” as a tight geographic pointer (opposite Jericho). Others treat it as a general orientation marker for the Jordan crossing area rather than the exact edge of the eastern territory (inference from place-name usage).
Why the disagreement exists
The passage is brief and assumes earlier narrative background (especially the prior grant of land east of the Jordan). Because it does not re-tell that episode, readers must decide how much detail “by lot” and the place phrases are meant to carry here.
What this passage clearly contributes
It explains who is included in the upcoming land distribution and why not all twelve tribes are part of that specific lot-based inheritance: two and a half tribes already possess land east of the Jordan near Jericho (explicit claim). It also portrays Israel’s settlement as ordered around Yahweh’s command, mediated through Moses, and structured by tribes and extended family groupings (explicit claims).