וְחִזַּקְתִּ֣י אֶת־לֵב־פַּרְעֹה֮ וְרָדַ֣ף אַחֲרֵיהֶם֒ וְאִכָּבְדָ֤ה בְּפַרְעֹה֙ וּבְכָל־חֵיל֔וֹ וְיָדְע֥וּ מִצְרַ֖יִם כִּֽי־אֲנִ֣י יְהוָ֑ה וַיַּֽעֲשׂוּ־כֵֽן׃
And I will harden Pharaoh’s heart, and he shall follow after them; and I will get Me honour upon Pharaoh, and upon all his host; and the Egyptians shall know that I am the LORD.’ And they did so.
Read kabbalistic (mystical) interpretation of Exodus 14:4: and classical mystical sources.