Exodus 4:21; Exodus 7:3; Exodus 7:9; Exodus 11:9; Exodus 11:10

Exodus 4:21

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.

Exodus 7:3

3 And I will harden Pharaoh's heart, and multiply my signs and my wonders in the land of Egypt.

Exodus 7:9

9 When Pharaoh shall speak unto you, saying, Shew a miracle for you: then thou shalt say unto Aaron, Take thy rod, and cast it before Pharaoh, and it shall become a serpent.

Exodus 11:9

9 And the LORD said unto Moses, Pharaoh shall not hearken unto you; that my wonders may be multiplied in the land of Egypt.

Exodus 11:10

10 And Moses and Aaron did all these wonders before Pharaoh: and the LORD hardened Pharaoh's heart, so that he would not let the children of Israel go out of his land.