Exodus 7:14-15
Exodus 7:14-15 KJV
And the LORD said unto Moses, Pharaoh's heart is hardened, he refuseth to let the people go. Get thee unto Pharaoh in the morning; lo, he goeth out unto the water; and thou shalt stand by the river's brink against he come; and the rod which was turned to a serpent shalt thou take in thine hand.