Numbers 33:37-39 ▼

37 And they journey from Kadesh and encamp in Mount Hor, in the extremity of the land of Edom.

38 And Aaron the priest goes up to Mount Hor by the command of YHWH, and dies there in the fortieth year of the going out of the sons of Israel from the land of Egypt, in the fifth month, on the first of the month;

39 and Aaron [is] a son of one hundred and twenty-three years in his dying on Mount Hor.