Numbers 33:38
38 And Aaron the priest went up jMount Hor at the command of the Lord and died there, in the fortieth year after the people of Israel had come out of the land of Egypt, on the first day of the fifth month.
Deuteronomy 32:50
50 And die on the mountain which you go up, and be gathered to your people, as vAaron your brother died in Mount Hor and was gathered to his people,
Deuteronomy 10:6
6 (The people of Israel wjourneyed from Beeroth Bene-jaakan1 to Moserah. xThere Aaron died, and there he was buried. And his son Eleazar ministered as priest in his place.