Exodus 7:14-16

King James Version

¹⁴ And the Lord said unto Moses, Pharaoh's heart is hardened, he refuseth to let the people go.

¹⁵ 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.

¹⁶ And thou shalt say unto him, The Lord God of the Hebrews hath sent me unto thee, saying, Let my people go, that they may serve me in the wilderness: and, behold, hitherto thou wouldest not hear.