the cave of the patriarchs in hebron is the second holiest site in judaism. other significant sites include a number of temples within the jewish quarter of old jerusalem, namely the hurva, belz, tiferet yisrael and the four sephardic synagogues. the beit el synagogue is of special importance to students of kaballah. the biblical mount sinai is believed to be the place where moses received the ten commandments from god – although there is considerable debate as to the location of the mountain. (scholarly opinion places it at either the mountain historically known as "sinai" or mount seir.)