Numbers 33:38

38 And Aaron the priest went up by the command of the Lord, and died there in the fortieth year of the departure of the children of Israel from the land of Egypt, in the fifth month, on the first of the month.

Numbers 33:38 Meaning and Commentary

Numbers 33:38

And Aaron the priest went up into Mount Hor, at the
commandment of the Lord
Delivered to Moses:

and died there in the fortieth year after the children of Israel were
come out of Egypt;
not being suffered to go with them into the land of Canaan, because of his sin of unbelief at Kadesh, the last place from whence they came: in Mount Hor he died,

on the first day of the fifth month;
the month Ab, answering to part of July and part of August; so that he lived but four months after his sister Miriam; see ( Numbers 20:1 Numbers 20:25-29 ) .

Numbers 33:38 In-Context

36 And they departed from Gesion Gaber, and encamped in the wilderness of Sin; and they departed from the wilderness of Sin, and encamped in the wilderness of Pharan; this is Cades.
37 And they departed from Cades, and encamped in mount Or near the land of Edom.
38 And Aaron the priest went up by the command of the Lord, and died there in the fortieth year of the departure of the children of Israel from the land of Egypt, in the fifth month, on the first of the month.
39 And Aaron was a hundred and twenty-three years old, when he died in mount Or.
40 And Arad the Chananitish king (he too dwelt in the land of Chanaan) having heard when the children of Israel were entering —

The Brenton translation of the Septuagint is in the public domain.