Exodus 11:9-10

Amplified Bible

⁹ Then the Lord said to Moses, “Pharaoh will not listen to you, so that My wonders (miracles) may be multiplied in the land of Egypt.” ¹⁰ Moses and Aaron did all these wonders (miracles) before Pharaoh; yet the Lord hardened Pharaoh’s heart, and he did not let the Israelites go out of his land.