Numbers 20:27-29

New King James Version

²⁷ So Moses did just as the Lord commanded, and they went up to Mount Hor in the sight of all the congregation. ^28 (A)Moses stripped Aaron of his garments and put them on Eleazar his son; and ^(B)Aaron died there on the top of the mountain. Then Moses and Eleazar came down from the mountain. ²⁹ Now when all the congregation saw that Aaron was dead, all the house of Israel mourned for Aaron ^(C)thirty days.