Exodus 10:19

16 Then Pharaoh called for Moses and Aaron in haste, and he said, "I have sinned against Yahweh your God, and against you.

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

18 He went out from Pharaoh, and prayed to Yahweh.

19 Yahweh turned an exceeding 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.

20 But Yahweh hardened Pharaoh`s heart, and he didn`t let the children of Israel go.

21 Yahweh 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."

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