Exodus 10:19

16 And Pharaoh hasteth to call for Moses and for Aaron, and saith, `I have sinned against Jehovah your God, and against you,

17 and now, bear with, I pray you, my sin, only this time, and make ye supplication to Jehovah your God, that He turn aside from off me only this death.`

18 And he goeth out from Pharaoh, and maketh supplication unto Jehovah,

19 and Jehovah turneth a very strong sea wind, and it lifteth up the locust, and bloweth it into the Red Sea -- there hath not been left one locust in all the border of Egypt;

20 and Jehovah strengtheneth the heart of Pharaoh, and he hath not sent the sons of Israel away.

21 And Jehovah saith unto Moses, `Stretch out thy hand towards the heavens, and there is darkness over the land of Egypt, and the darkness is felt.`

22 And Moses stretcheth out his hand towards the heavens, and there is darkness -- thick darkness in all the land of Egypt three days;