Midrash su Isaia 28:9

(Gen. 2, 7) Then said his sister to Pharaoh's daughter: "Shall I go and call thee a nurse of the Hebrew women that she may nurse the child for thee? Why did she emphasize a Hebrew nurse? From this it may be inferred that Moses was given to be nursed by many Egyptian women, but he refused to be nursed; the Holy One, praised be He, said: Shall an unclean thing nurse the mouth that is destined to speak with Me?" And this is the nearing of the passage (Is. 23, 9) Whom shall he teach knowledge? And whom shall he give to understand doctrine? Those that are weaned from the milk, those that are taken from the breasts; i.e., unto whom did the Lord teach knowledge? and to whom did He grant the understanding of doctrines? To him that weaned from the milk and that was taken from the breasts [from the Egyptians]. And Pharaoh's daughter said unto her, 'Go;' and the maiden went. Said R. Elazar: "From this it may be inferred that she went quickly as a maiden." R. Samuel b. Nachmeni said: "This means that she concealed her words by not telling [Pharaoh's daughter] that she was his sister and that she was going to call her mother." (Ib., ib. 9) And Pharaoh's daughter said unto her, 'Take this child away.' Said R. Chama b. Chanina: "She prophesied but did know what she was prophesising. Helichi means take what belongs to thee." (Ib.) And I will give thee thy wages. Said R. Chama b. R. Chanina: "It is not sufficient for the righteous that their lost things are returned to them, but they are even paid for them, as it is said. And I will give thee thy wages."

THE GATHERING OF THE WATERS
ON the third day all the earth was flat like a plain and the waters covered the surface of all the earth. When the word of the Almighty was uttered, "Let the waters be gathered together" (Gen. 1:9), the mountains and hills arose from the ends of the earth and they were scattered over the surface of all the earth, and valleys were formed over the inner parts of the earth; and the waters were rolled together and gathered into the valleys, as it is said, "And the gathering together of the waters he called seas" (Gen. 1:10). Forthwith the waters became proud and they arose to cover the earth as at first, when the Holy One, blessed be He, rebuked them || and subdued them, and placed them beneath the soles of His feet, and measured them with the hollow of His hand that they should neither decrease nor increase. He made the sand as the boundary of the sea, just like a man who makes a fence for his vineyard. When they rise and see the sand before them they return to their former place, as it is said, "Fear ye not me? saith the Lord: will ye not tremble at my presence, which have placed the sand for the bound of the sea?" (Jer. 5:22).