Psalm 78:44

So Moses and Aaron did thus, as Yahweh had commanded. And he raised up the staff and struck the water that was in the Nile, in the sight of Pharaoh and in the sight of his servants, and all the water that was in the Nile was turned to blood.

Remember His wondrous deeds which He has done, His miraculous signs and the judgments uttered by His mouth,

“They refused to listen, And did not remember Your wondrous deeds which You did among them; So they became stiff-necked and gave themselves a chief to return to their slavery in Egypt. But You are a God of lavish forgiveness, Gracious and compassionate, Slow to anger and abounding in lovingkindness; And You did not forsake them.

They set forth the words of His signs among them, And miracles in the land of Ham.

Then the third angel poured out his bowl into the rivers and the springs of waters, and they became blood.