Exodus 9:35
And Pharaoh's heart was hard, and he did not release the {Israelites}, as Yahweh had said {by the agency of Moses}.
Exodus 4:21
And Yahweh said to Moses, "When you go to return to Egypt, see all of the wonders that I have put in your hand, and do them before Pharaoh, and I myself will harden his heart, and he will not release the people.
Treasury of Scripture Knowledge
Summary
And the heart of Pharaoh was hardened, neither would he let the children of Israel go; as the LORD had spoken by Moses.
General references
Bible References
General references
Jeremiah 34:11
But {afterward} they turned back and they brought back the [male] slaves and the female slaves whom they had let go free, and they subdued them as [male] slaves and female slaves.