Exodus 7:22

Now it happened that in the morning his spirit was troubled, so he sent and called for all the magicians of Egypt and all its wise men. And Pharaoh recounted to them his dream, but there was no one who could interpret them to Pharaoh.

“But Pharaoh will not listen to you. And I will set My hand upon Egypt and bring out My hosts, My people the sons of Israel, from the land of Egypt by great judgments.

Then Pharaoh also called for the wise men and the sorcerers, and they also, the magicians of Egypt, did the same with their secret arts.

Yet Pharaoh’s heart was hardened with strength, and he did not listen to them, as Yahweh had spoken.

And the magicians did the same with their secret arts; they caused the frogs to come up on the land of Egypt.

“Then You performed signs and wonders against Pharaoh, Against all his servants and all the people of his land; For You knew that they acted presumptuously toward them, And made a name for Yourself as it is this day.

And the second angel sounded, and something like a great mountain burning with fire was thrown into the sea; and a third of the sea became blood,

These have the authority to shut up the sky, so that rain will not fall during the days of their prophesying; they also have authority over the waters to turn them into blood, and to strike the earth with every plague, as often as they wish.