Aaron dies on Mount Hor
At God's command, Moses took Aaron's priestly garments and put them on his son Eleazar; Aaron died on the mountaintop at 123.
Moses stripped Aaron of his garments, and put them on Eleazar his son. Aaron died there on the top of the mountain, and Moses and Eleazar came down from the mountain.
Numbers 20:28 (World English Bible)
Israel mourned Aaron for thirty days. The high priesthood passed to Eleazar. Hebrews contrasts that line of priests, who kept dying and being replaced, with Jesus, the priest who lives forever (Hebrews 7:23–25).
Places
Dating notes
The first day of the fifth month of the 40th year (Numbers 33:38), 1452 BC in Ussher. Mount Hor is traditionally identified with Jebel Harun near Petra, though some prefer a site nearer Kadesh.