Numbers 20:28

“The holy garments of Aaron shall be for his sons after him, that in them they may be anointed and ordained.

“So when you have seen it, you too will be gathered to your people, as Aaron your brother was,

Then Aaron the priest went up to Mount Hor at the command of Yahweh, and he died there in the fortieth year after the sons of Israel had come from the land of Egypt, on the first day in the fifth month.

(Now the sons of Israel set out from Beeroth Bene-jaakan to Moserah. There Aaron died, and there he was buried, and Eleazar his son ministered as priest in his place.