Numbers 33:38-40

New International Version - UK

³⁸ At the Lord’s command Aaron the priest went up Mount Hor, where he died on the first day of the fifth month of the fortieth year after the Israelites came out of Egypt. ³⁹ Aaron was a hundred and twenty-three years old when he died on Mount Hor.

⁴⁰ The Canaanite king of Arad, who lived in the Negev of Canaan, heard that the Israelites were coming.