Matthew Poole and continuators on Numbers 20:24

24 Aaron shall be gathered unto his people: for he shall not enter into the land which I have given unto the children of Israel, because ye rebelled against my word at the water of Meribah.

This was one but not the onely, reason. God would not have Moses and Aaron to carry the people into Canaan, for this reason also, to signifie the insufficiency of the Mosaical law and Aaronical Priesthood to make them perfectly happy, and the necessity of a better, and so to keep the Israelites from resting in them so as to be taken off from their expectation of Christ, and from the entertainment of him when he should come.

Marginal references: Heb. mouth.