In the year 1569 after the creation of the world, Noah divided the earth by lot among his three sons, in the presence of an angel. Each one stretched forth his hand and took a slip from the bosom of Noah. Shem's slip was inscribed with the middle of the earth, and this portion became the inheritance of his descendants unto all eternity. Noah rejoiced that the lot had assigned it to Shem. Thus was fulfilled his blessing upon him, "And God in the habitation of Shem," for three holy places fell within his precincts--the Holy of Holies in the Temple, Mount Sinai, the middle point of the desert, and Mount Zion, the middle point of the navel of the earth.
Noah and the Angels
Legends of the Jews 4:83