Numbers 33:38

And Aaron the priest went up into mount Hor at the commandment of Jehovah, and died there, in the fortieth year after the children of Israel were come out of the land of Egypt, in the fifth month, on the first day of the month.

Deuteronomy 10:6

(And the children of Israel journeyed from Beeroth Bene-jaakan to Moserah. There Aaron died, and there he was buried; and Eleazar his son ministered in the priest's office in his stead.

Deuteronomy 32:50

and die in the mount whither thou goest up, and be gathered unto thy people, as Aaron thy brother died in mount Hor, and was gathered unto his people:

Numbers 20:24-28

Aaron shall be gathered unto his people; for he shall not enter into the land which I have given unto the children of Israel, because ye rebelled against my word at the waters of Meribah.

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American Standard Version Public Domain