Exodus Chapter 7, Verse 13
From BibleWiki
13: And he hardened Pharaoh's heart, that he hearkened not unto
them; as the LORD had said.
13: And Pharao's heart was hardened, and he did not hearken to them,
as the Lord had commanded.
13: and the heart of Pharao was hardened, and he hearkened not to them, as the Lord charged them.
Exodus Chapter 7, Verse 13/commentary

