Exodus 10:25-29

But Moses said, “You must also give us sacrifices and burnt offerings, that we may sacrifice to the LORD our God. Our livestock also shall go with us; not a hoof shall be left behind. For we must take some of them to serve the LORD our God, and even we do not know with what we must serve the LORD until we arrive there.” But the LORD hardened Pharaoh’s heart, and he would not let them go. Then Pharaoh said to him, “Get away from me! Take heed to yourself and see my face no more! For in the day you see my face you shall die!” So Moses said, “You have spoken well. I will never see your face again.”