Exodus 9:12-14

Amplified Bible

¹² But the Lord hardened the heart of Pharaoh, and he did not listen or pay attention to them, just as the Lord had told Moses.

¹³ Then the Lord said to Moses, “Get up early in the morning and stand before Pharaoh and say to him, ‘Thus says the Lord, the God of the Hebrews, “Let My people go, so that they may serve Me. ¹⁴ For this time I will send all My plagues ^[a]on you [in full force,] and on your servants and on your people, so that you may know [without any doubt] and acknowledge that there is no one like Me in all the earth.