Exodus 10:12; Exodus 10:21

12 Then the LORD said to Moses, "Stretch out your hand over the land of Egypt for the locusts, so that they may come upon the land of Egypt and eat every plant in the land, all that the hail has left."

21 Then the LORD said to Moses, "Stretch out your hand toward heaven, that there may be darkness over the land of Egypt, a darkness to be felt."