Exodus 4:21 And the Lord said unto Moses, When thou goest to return into Egypt, see that thou do all those wonders before Pharaoh, which I have put in thine hand: but I will harden his heart, that he shall not let the people go. 10 I MC VC

Hebrews 3:8 Harden not your hearts, as in the provocation, in the day of temptation in the wilderness: 9 I MC VC