Numbers 33:37-39

Complete Jewish Bible

³⁷ They moved on from Kadesh and camped at Mount Hor, at the border of the land of Edom. ³⁸ At Adonai’s order Aharon the cohen went up on Mount Hor, and he died there on the first day of the fifth month of the fortieth year after the people of Isra’el had left the land of Egypt. ³⁹ Aharon was 123 years old when he died on Mount Hor.