The Holy One, blessed be He, said to Moses: Moses! "Stretch out thine hand over the sea, and divide it" (Ex. 14:16). "And Moses stretched out his hand over the sea" (Ex. 14:21), but the sea refused to be divided. What did the Holy One, blessed be He, do? He looked at the sea, and the waters saw the face of the Holy One, blessed be He, and they trembled and quaked, and descended into the depths, as it is said, "The waters saw thee, O God; the waters saw thee, they were afraid: the depths also trembled" (Ps. 77:16).