In Numbers 34:29, the list of chiefs appointed to divide the land completes exactly the command given in verse 18.

In Numbers 1:4-16, one chief per tribe is chosen for the census—mirroring the same per-tribe selection pattern here for land division.

In Numbers 13:2, one chief per tribe is chosen to spy Canaan—repeating the same administrative pattern of selecting a tribal leader.

In Joshua 4:2, twelve men (one per tribe) are taken for stones—another instance of selecting one representative from each tribe.