21And the Lord said to Moses, Let your hand be stretched out to heaven, and all the land of Egypt will be dark, so that men will be feeling their way about in the dark.
22And when Moses' hand was stretched out, dark night came over all the land of Egypt for three days;
23They were not able to see one another, and no one got up from his place for three days: but where the children of Israel were living it was light.
24Then Pharaoh sent for Moses, and said, Go and give worship to the Lord; only let your flocks and your herds be kept here: your little ones may go with you.
25But Moses said, You will have to let us take burned offerings to put before the Lord our God.
26So our cattle will have to go with us, not one may be kept back; for they are needed for the worship of the Lord our God; we have no knowledge what offering we have to give till we come to the place.
27But the Lord made Pharaoh's heart hard, and he would not let them go.
