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, that they may come up on the land of Egypt and eat every plant of the land, even all that the hail has left."

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