en_tn_condensed/exo/14/17.md

Be aware

"Know"

I will harden the Egyptians' hearts

"I will cause the Egyptians to became more defiant" Here "hearts" refers to the Egyptians themselves. Their stubborn attitude is spoken of as if their hearts were hard.

so they will go after them

"so that the Egyptians will go into the sea after the Israelites"