As miraculous as the taste of manna was it descent from heaven. First came a north wind to sweep the floor of the desert; then a rain to wash it quite clean; then dew descended upon it, which was congealed into a solid substance by the wind, that it might serve as a table for the heaven-descending gold. But, that no insects or vermin might settle on the manna, the frozen dew formed not only a tablecloth, but also a cover for the manna, so that it lay enclosed there as in a casket, protected from soiling or pollution above and below.