Numbers 20:23-27

Then the Lord spoke to Moses and Aaron at Mount Hor by the border of the land of Edom, saying,

“Aaron will be gathered to his people; for he shall not enter the land which I have given to the sons of Israel, because you rebelled against My command at the waters of Meribah.

Take Aaron and his son Eleazar, and bring them up to Mount Hor.

Then strip Aaron of his garments and put them on his son Eleazar. So Aaron will be gathered to his people and will die there.”

So Moses did just as the Lord had commanded, and they went up to Mount Hor in the sight of all the congregation.