18So he went out from Pharaoh and made prayer to the Lord.
19And the Lord sent a very strong west wind, which took up the locusts, driving them into the Red Sea; not one locust was to be seen in any part of Egypt.
20But the Lord made Pharaoh's heart hard, and he did not let the children of Israel go.
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.