Numbers 33:37-42

They left Kadesh and camped at Mount Hor, on the border of Edom. Aaron the priest obeyed the LORD and went up Mount Hor. There he died on the first day of the fifth month In the fortieth year after the Israelites left Egypt. Aaron was 123 years old when he died on Mount Hor. The Canaanite king of Arad, who lived in the southern area of Canaan, heard that the Israelites were coming. The people left Mount Hor and camped at Zalmonah. They left Zalmonah and camped at Punon.