Reference

Numbers 9:7

And those men said unto him, We are defiled by the dead body of a man: wherefore are we kept back, that we may not offer an offering of the Lord in his appointed season among the children of Israel?
5

And they kept the passover on the fourteenth day of the first month at even in the wilderness of Sinai: according to all that the Lord commanded Moses, so did the children of Israel.

6

And there were certain men, who were defiled by the dead body of a man, that they could not keep the passover on that day: and they came before Moses and before Aaron on that day:

7

And those men said unto him, We are defiled by the dead body of a man: wherefore are we kept back, that we may not offer an offering of the Lord in his appointed season among the children of Israel?

8

And Moses said unto them, Stand still, and I will hear what the Lord will command concerning you.

9

And the Lord spake unto Moses, saying,

Counter-Arguments

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

Israel-Specific Promises

The verse describes a specific ritual purity issue faced by individual Israelites, not a promise or covenant made to the nation as a whole. It concerns their ability to participate in a general offering, not a unique promise given to Israel.