Mount Hor (Hebrew: הֹר הָהָר, Hor Ha-Har) is the name given in the Old Testament to two distinct mountains. One borders the land of Edom in the area south of the Dead Sea, and the other is by the Mediterranean Sea at the Northern border of the Land of Israel. The first Mount Hor is especially significant to the Israelites as Aaron the high priest, brother of Moses, died there.