Numbers 20:22

22 Then they set out from ^aKadesh, and the sons of Israel, the whole congregation, came to Mount Hor.

Numbers 20:23

The Death of Aaron

23 And Yahweh spoke to Moses and Aaron at ^aMount Hor by the border of the land of Edom, saying,

Numbers 33:38

^aThen Aaron the priest went up to Mount Hor at the ¹command 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.