Numbers 20:22-29
22Then they set out from aKadesh, and the sons of Israel, the whole congregation, came to Mount Hor.
The Death of Aaron
23And Yahweh spoke to Moses and Aaron at aMount Hor by the border of the land of Edom, saying, 24“Aaron will be agathered to his people, for he shall not enter the land which I have given to the sons of Israel because byou rebelled against My 1command at the waters of Meribah. 25“Take Aaron and his son aEleazar and bring them up to Mount Hor; 26and strip Aaron of his garments and put them on his son Eleazar. So Aaron will be agathered to his people and will die there.” 27So Moses did just as Yahweh had commanded, and they went up to Mount Hor in the sight of all the congregation. 28And Moses stripped Aaron of his garments and aput them on his son Eleazar, and bAaron died there on the mountain top. Then Moses and Eleazar came down from the mountain. 29So all the congregation saw that Aaron breathed his last, and all the house of Israel wept for Aaron thirty adays.