Psalm 78:44-46

He turned their river into blood; they could not drink from their streams. He sent swarms of flies that devoured them, and frogs that devastated them. He gave their crops to the grasshopper, their produce to the locust.

He turned their river into blood 
Exodus 7:20-21  Moses and Aaron did just as the LORD had commanded. He raised his staff in the presence of Pharaoh and his officials and struck the water of the Nile, and all the water changed to blood. The fish in the Nile died, and the river smelled so bad that the Egyptians could not drink its water. Blood was everywhere in Egypt.
Psalm 105:29  He turned their waters into blood, causing their fish to die.

He sent swarms of flies that devoured them 
Exodus 8:24  And the LORD did this. Dense swarms of flies poured into Pharaoh's palace and into the houses of his officials; throughout Egypt the land was ruined by flies. 
Psalm 105:31  He spoke, and there came swarms of flies, and gnats throughout their country.

and frogs that devastated them 
Exodus 8:2  "If you refuse to let them go, I will send a plague of frogs on  your whole country. The Nile will teem with frogs."
Exodus 8:6  So Aaron stretched out his hand over the waters of Egypt, and the frogs came up and covered the land.

He gave their crops to the grasshopper, their produce to the locust 
Exodus 10:13-15  So Moses stretched out his staff over Egypt, and the LORD made an east wind blow across the land all that day and all that night. By morning the wind had brought the locusts; they invaded all Egypt and settled down in every area of the country in great numbers. Never before had there been such a plague of locusts, nor will there ever be again. They covered all the ground until it was black. They devoured all that was left after the hail--everything growing in the fields and the fruit on the trees. Nothing green remained on tree or plant in all the land of Egypt.

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
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