Exodus 7:25

Overview - Exodus 7
1	Moses and Aaron are encouraged to go again to Pharaoh.
7	Their age.
8	Aaron's rod is turned into a serpent.
11	The sorcerers do the like; but their rods are swallowed up by Aaron's.
13	Pharaoh's heart is hardened.
14	God's message to Pharaoh.
19	The river is turned into blood; and the consequent distress of the Egyptians.

Exodus 7:25  (King James Version)
And seven days were fulfilled, after that the LORD had smitten the river.