Numbers 33:38
And Aaron the priest went up into mount Hor at the commandment of the Lord, and died there, in the fortieth year after the children of Israel were come out of the land of Egypt, in the first day of the fifth month.
Cross-reference
Numbers 20:24-28 recounts Aaron's death at Mount Hor exactly as recorded here — the same event from the narrative.
Numbers 14:33 foretells the 40-year wilderness wandering; Numbers 33:38 marks its conclusion with Aaron's death.
Numbers 20:22 describes the journey to Mount Hor, the immediate setting for Aaron's death recorded in Numbers 33:38.
Numbers 20:25 contains the command to take Aaron up Mount Hor, directly preceding the death reported in Numbers 33:38.
Numbers 20:28 narrates the actual death of Aaron on Mount Hor, identical to the event in Numbers 33:38.
Numbers 27:13 says Moses will be gathered like Aaron, echoing the death of Aaron on Mount Hor from Numbers 33:38.
Numbers 20:1 records Miriam's death earlier in the wilderness, paralleling Aaron's death later in the same journey.
Deuteronomy 32:50 explicitly references Aaron's death on Mount Hor as a pattern for Moses' own death.
Exodus 16:35 notes the 40-year manna provision, which brackets Aaron's death at the end of that period in Numbers 33:38.
Deuteronomy 1:3 gives another date in the 40th year; Numbers 33:38 specifies Aaron's death in the same year.