Numbers
Chapters 20:26-29
New English Translation
26Remove Aaron’s priestly garments and put them on Eleazar his son, and Aaron will be gathered to his ancestors and will die there.”
27So Moses did as the Lord commanded; and they went up Mount Hor in the sight of the whole community.
28And Moses removed Aaron’s garments and put them on his son Eleazar. So Aaron died there on the top of the mountain. And Moses and Eleazar came down from the mountain.
29When all the community saw that Aaron was dead, the whole house of Israel mourned for Aaron thirty days.