Bamidbar 33:38

38 And Aharon HaKohen went up into Mt Hor at the command of Hashem, and died there, in the 40th year after the Bnei Yisroel were come out of Eretz Mitzrayim, in the first yom of the fifth month.

Bamidbar 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 ) .

Bamidbar 33:38 In-Context

36 And they set out from Etzyon-Gever, and encamped in the Midbar Tzin, which is Kadesh.

37 And they set out from Kadesh and encamped at Mt Hor, at the border of Eretz Edom.

38 And Aharon HaKohen went up into Mt Hor at the command of Hashem, and died there, in the 40th year after the Bnei Yisroel were come out of Eretz Mitzrayim, in the first yom of the fifth month.

39 And Aharon was a hundred and twenty and three years old when he died on Mt Hor.

40 And Melech Arad the Kena’anite, which dwelt in the Negev in Eretz Kena’an, heard of the coming of the Bnei Yisroel.