Numbers 20:24-26

²⁴Aaron 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 order at the waters of Meribah.

²⁵Take Aaron and Elazar, his son, and cause them to go up unto mount Hor:

²⁶And cause Aaron to take off his garments, and clothe therewith Elazar his son; and Aaron shall be gathered in, and he shall die there.