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1Yahweh said to Moses, "Go in to Pharaoh, for I have hardened his heart, and the heart of his servants, that I may show these my signs in the midst of them, 2and that you may tell in the hearing of your son, and of your son`s son, what things I have done to Egypt, and my signs which I have done among them; that you may know that I am Yahweh."
Exodus 10:1-2 (WEB)