Parallel
Exodus 8:15
Brenton's English Septuagint · Berean Standard Bible
So the charmers said to Pharao, This is the finger of God. But the heart of Pharao was hardened, and he hearkened not to them, as the Lord said.
When Pharaoh saw that there was relief, however, he hardened (note: Or made heavy; also in verse 32) his heart and would not listen to Moses and Aaron, just as the LORD had said.