Numbers 33:39

37 They set out from Kadesh and camped at Mount Hor, on the outskirts of the land of Edom.

38 At the LORD’s command, Aaron the priest climbed Mount Hor and died there on the first day of the fifth month, in the fortieth year after the Israelites had come out of the land of Egypt.

Aaron was 123 years old when he died on Mount Hor.

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

41 And the Israelites set out from Mount Hor and camped at Zalmonah.

Here the Bible tells a story about someone else. Ask yourself what it can say to us today. Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
Aaron was 123 years old when he died on Mount Hor.
KJV
And Aaron was an hundred and twenty and three years old when he died in mount Hor.
WEB
Aaron was one hundred twenty-three years old when he died in Mount Hor.
ASV
And Aaron was a hundred and twenty and three years old when he died in mount Hor.
DARBY
And Aaron was a hundred and twenty-three years old when he died on mount Hor.
BLB
And Aaron [was] a son of three and twenty and a hundred years when he died on Mount Hor.
ÅB
Aron var hundre og tre og tyve år gammel da han døde på fjellet Hor.
OTB
Aron var hundre og tjuetre år gammel da han døde på fjellet Hor.
B1930
Aron var hundre og tre og tyve år gammel da han døde på fjellet Hor.

Study notes (Tyndale)

Original text and word study