Exodus 7:12-14

New King James Version

¹² For every man threw down his rod, and they became serpents. But Aaron’s rod swallowed up their rods. ¹³ And Pharaoh’s heart grew hard, and he did not heed them, as the Lord had said.

The First Plague: Waters Become Blood

¹⁴ So the Lord said to Moses: ^(A)“Pharaoh’s heart is hard; he refuses to let the people go.