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 ) .