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.