Exodus 7:12-14

New International Version

¹² Each one threw down his staff and it became a snake. But Aaron’s staff swallowed up their staffs. ¹³ Yet Pharaoh’s heart^(A) became hard and he would not listen^(B) to them, just as the Lord had said.

The Plague of Blood

¹⁴ Then the Lord said to Moses, “Pharaoh’s heart is unyielding;^(C) he refuses to let the people go.