Exodus 8:32 in the World English Bible
Pharaoh hardened his heart this time also, and he didn’t let the people go.
Context
31 And the LORD did according to the word of Moses; and he removed the swarms of flies from Pharaoh, from his servants, and from his people; there remained not one.
32 And Pharaoh hardened his heart at this time also, neither would he let the people go.