Reference

Numbers 33:38

And Aaron the priest went up into mount Hor at the commandment of the Lord, and died there, in the fortieth year after the children of Israel were come out of the land of Egypt, in the first day of the fifth month.
36

And they removed from Ezion–gaber, and pitched in the wilderness of Zin, which is Kadesh.

37

And they removed from Kadesh, and pitched in mount Hor, in the edge of the land of Edom.

38

And Aaron the priest went up into mount Hor at the commandment of the Lord, and died there, in the fortieth year after the children of Israel were come out of the land of Egypt, in the first day of the fifth month.

39

And Aaron was an hundred and twenty and three years old when he died in mount Hor.

40

And king Arad the Canaanite, which dwelt in the south in the land of Canaan, heard of the coming of the children of Israel.

Counter-Arguments

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

First Day of the Week

The verse explicitly states "the first day of the fifth month," which refers to a specific day of a specific month, not the first day of the week.

Israel-Specific Promises

The verse describes a historical event—Aaron's death—and does not contain any promises, prophecies, or covenants directed at Israel.

Time-Bound Fulfillment

The verse describes a past event with specific time markers, but it does not present a prophecy with a defined duration that was expected to be recognized upon fulfillment.

Christ as High Priest

This verse describes the death of Aaron, a specific historical event concerning an Old Testament priest. It does not mention Christ, priesthood in a broader sense, mediation, intercession, or sacrifice, which are all key components of the "Christ as High Priest" theme.