Exodus 9:35
And the heart of Pharaoh was hard, and he did not let the people go, as the Lord had said by the mouth of Moses.
Exodus 4:21
And the Lord said to Moses, When you go back to Egypt, see that you do before Pharaoh all the wonders which I have given you power to do: but I will make his heart hard and he will not let the people go.
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 later, they took back again the servants and the servant-girls whom they had let go free, and put them again under the yoke as servants and servant-girls.