וְיָדְע֥וּ מִצְרַ֖יִם כִּי־אֲנִ֣י יְהוָ֑ה בְּהִכָּבְדִ֣י בְּפַרְעֹ֔ה בְּרִכְבּ֖וֹ וּבְפָרָשָֽׁיו׃
Die Ägypter sollen erfahren, dass ich der Herr bin, wenn ich mich verherrliche an Pharao, an seinen Wagen und Reitern.
Midrash Tanchuma Buber
(Exod. 7:14:) AND THE LORD SAID UNTO MOSES: PHARAOH'S HEART IS HARDENED. The Holy One said: By your life, through that word (HARDENED), because you have hardened (rt.: KBD) your heart, I will be honored (rt.: KBD).76Tanh., Exod. 2:12; Exod. R. 9:8. It is so stated (in Exod. 14:18): WHEN I HAVE BEEN HONORED (rt.: KBD) THROUGH PHARAOH.