Exodus 10:21-29 - Plague Nine: Darkness
21 And the LORD said unto Moses, "Stretch out thy hand unto heaven, and let there be darkness upon the land of Egypt: even that they may feel the darkness." 22 And Moses stretched forth his hand unto heaven, and there was a dark mist upon all the land of Egypt three days long, 23 so that no man saw another, neither rose up from the place where he was by the space of three days, but all the children of Israel had light where they dwelled.
24 Then Pharaoh called for Moses and said, "Go and serve the LORD; only let your sheep, and your oxen abide, but let your children go with you."
25 And Moses answered, "Thou must give us also offerings and burnt offerings for to sacrifice unto the LORD our God. 26 Our cattle therefore shall go with us, and there shall not one hoof be left behind, for thereof must we take to serve the LORD our God. Moreover, we cannot know wherewith we shall serve the LORD, until we come thither."
27 But the LORD hardened Pharaoh's heart, so that he would not let them go. 28 And Pharaoh said unto him, "Get thee from me and take heed to thyself that thou see my face no more. For whensoever thou comest in my sight, thou shalt die."
29 And Moses said, "Let it be as thou hast said: I will see thy face no more."