Numbers 20:22-26

Now when they set out from Kadesh, the sons of Israel, the whole congregation, came to Mount Hor. Death of Aaron

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.”