" And it shall come to pass that from one new moon to another, and from one Sabbath to another, shall all flesh come to worship before Me, saith the Lord (Isa. lxvi. 23). But how is it possible that all flesh shall come every new moon and Sabbath to Jerusalem? Rabbi Levi saith, " In the future Jerusalem will be as the land of Israel, and the land of Israel will be as the whole world." But how will they come from the end of the world every new moon and Sabbath? " The clouds will come and carry them and bring them to Jerusalem, where they will perform their morning prayer, and will carry them back to their several homes; and this is the meaning of the prophet's saying (Isa. lx. 8), c Who are these that fly as a cloud (in the morning), and as the doves to their windows (in the evening)? ' • Pesikta.