Numbers 33:37-39

Amplified Bible

³⁷ They moved out from Kadesh and camped at Mount Hor, on the edge of the land of Edom.

³⁸ Aaron the priest went up on Mount Hor at the command of the Lord, and died there in the fortieth year after the Israelites came out of the land of Egypt, on the first day of the fifth month.^{(A) 39} Aaron was a hundred and twenty-three years old when he died on Mount Hor.