Exodus 10:25

21The LORD said to Moses, “Stretch out your hand toward the sky, that there may be darkness over the land of Egypt, even darkness which may be felt.”

22Moses stretched out his hand toward the sky, and there was a thick darkness in all the land of Egypt for three days.

23They didn’t see one another, and nobody rose from his place for three days; but all the children of Israel had light in their dwellings.

24Pharaoh called to Moses, and said, “Go, serve the LORD. Only let your flocks and your herds stay behind. Let your little ones also go with you.”

25Moses said, “You must also give into our hand sacrifices and burnt offerings, that we may sacrifice to the LORD our God.

26Our livestock also shall go with us. Not a hoof shall be left behind, for of it we must take to serve the LORD our God; and we don’t know with what we must serve the LORD, until we come there.”

27But the LORD hardened Pharaoh’s heart, and he wouldn’t let them go.

28Pharaoh said to him, “Get away from me! Be careful to see my face no more; for in the day you see my face you shall die!”

29Moses said, “You have spoken well. I will see your face again no more.”