TSK · Exodus 10:20

But I know that the king of Egypt will not let you go, not even under force.

Yet Pharaoh’s heart became hard, and he did not listen to them, just as the LORD had predicted.

The Eighth Blow: Locusts The LORD said to Moses,“Go to Pharaoh, for I have hardened his heart and the heart of his servants, in order to display these signs of mine before him,

So Moses and Aaron did all these wonders before Pharaoh, but the LORD hardened Pharaoh’s heart, and he did not release the Israelites from his land.

He said,“Go and tell these people:‘Listen continually, but don’t understand! Look continually, but don’t perceive!’

So then, God has mercy on whom he chooses to have mercy, and he hardens whom he chooses to harden.