Pharaoh's heart was hardened, and he didn't listen to them; as Yahweh had spoken.
TSK
TSK · Romans 9:18
Treasury of Scripture Knowledge references in WEB.
But Sihon king of Heshbon would not let us pass by him; for Yahweh your God hardened his spirit, and made his heart obstinate, that he might deliver him into your hand, as at this day.
O Yahweh, why do you make us to err from your ways, and harden our heart from your fear? Return for your servants' sake, the tribes of your inheritance.
saying, 'Go to this people, and say, in hearing, you will hear, but will in no way understand. In seeing, you will see, but will in no way perceive.
The law came in besides, that the trespass might abound; but where sin abounded, grace abounded more exceedingly;
What then? That which Israel seeks for, that he didn't obtain, but the chosen ones obtained it, and the rest were hardened.
and with all deception of wickedness for those who are being lost, because they didn't receive the love of the truth, that they might be saved.