וַאֲנִ֗י הִנְנִ֤י מְחַזֵּק֙ אֶת־לֵ֣ב מִצְרַ֔יִם וְיָבֹ֖אוּ אַחֲרֵיהֶ֑ם וְאִכָּבְדָ֤ה בְּפַרְעֹה֙ וּבְכָל־חֵיל֔וֹ בְּרִכְבּ֖וֹ וּבְפָרָשָֽׁיו׃
Adapun Aku, sesungguhnya Aku akan mengeraskan hati orang Mesir sehingga mereka masuk menyusul orang Israel, dan Aku akan dimuliakan melalui Firaun dan seluruh pasukannya, melalui kereta-keretanya dan para penunggang kudanya.
Or HaChaim
ואני הנני מחזק את לב מצרים, "And I, behold I will harden the heart of Egypt, etc." G'd's attribute of Mercy informed the Israelites from a sense of compassion that they should not be worried when they saw that the sea did not close after they had crossed, but remained open for the Egyptian cavalry to descend into in hot pursuit. He explained that this was only the preamble of G'd dealing with the entire Egyptian army and wiping them out.