And I will harden Pharaoh’s heart so that he will pursue them. But I will gain honor by means of Pharaoh and all his army, and the Egyptians will know that I am the LORD.” So this is what the Israelites did.
We have here, I. Instructions given to Moses concerning Israel's motions and encampments, which were so very surprising that if Moses had not express orders about them before they would scarcely have been persuaded to follow the pillar of cloud and fire. That therefore there might be no scruple nor dissatisfaction about it, Moses is told before, 1. Whither they must go, Exo 14:1, Exo 14:2.
Commenting on Exodus 14:1-9
And I will harden Pharaoh's heart,.... Once more, as he had often done: that he shall follow after them: to Pihahiroth, and even into the sea after them: and I will be honoured upon Pharaoh, and upon all his host; in his wisdom, faithfulness, power, and justice, by the destruction of them: that the Egyptians may know that I am the Lord; the only Jehovah...
And I will harden Pharaoh's heart, that he shall follow after them; and I will be honoured upon Pharaoh, and upon all his host; that the Egyptians may know that I [am] the LORD. And they did so. (c) By punishing his obstinate rebellion.