Reference

Numbers 32:28

So concerning them Moses commanded Eleazar the priest, and Joshua the son of Nun, and the chief fathers of the tribes of the children of Israel:
26

Our little ones, our wives, our flocks, and all our cattle, shall be there in the cities of Gilead:

27

But thy servants will pass over, every man armed for war, before the Lord to battle, as my lord saith.

28

So concerning them Moses commanded Eleazar the priest, and Joshua the son of Nun, and the chief fathers of the tribes of the children of Israel:

29

And Moses said unto them, If the children of Gad and the children of Reuben will pass with you over Jordan, every man armed to battle, before the Lord, and the land shall be subdued before you; then ye shall give them the land of Gilead for a possession:

30

But if they will not pass over with you armed, they shall have possessions among you in the land of Canaan.

Counter-Arguments

The strongest case that this verse does not belong in this theme.

Israel-Specific Promises

This verse is a narrative account of Moses giving a command to specific leaders regarding the tribes of Israel, not a promise, prophecy, or covenant directed at ethnic Israel or the nation. It describes an action taken by Moses, not a divine declaration of future blessings or obligations for Israel.

Christ as High Priest

This verse describes Moses giving commands to Eleazar the priest and others regarding the tribes of Israel. It makes no mention of Jesus, priesthood in general, or any sacrificial or mediatorial roles, thus offering no direct or indirect support for the theme of "Christ as High Priest."