Numbers 33:37-39

Darby Translation

³⁷ And they removed from Kadesh, and encamped in mount Hor, in the border of the land of Edom.

³⁸ And Aaron the priest went up mount Hor by the commandment of Jehovah, and died there, in the fortieth year after the children of Israel came out of the land of Egypt, in the fifth month, on the first of the month.

³⁹ And Aaron was a hundred and twenty-three years old when he died on mount Hor.