Exodus 10:20

Now therefore please forgive my sin again, and pray to the LORD your God, that he may also take away from me this death.”

Moses went out from Pharaoh, and prayed to the LORD.

The LORD sent an exceedingly strong west wind, which took up the locusts, and drove them into the Red Sea. There remained not one locust in all the borders of Egypt.

The 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.”

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

They 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.