Romans 9:18

So then he has mercy on whom he will, and whom he will, he hardens.

Treasury of Scripture Knowledge

Summary

And Pharaoh sent, and, behold, there was not one of the cattle of the Israelites dead. And the heart of Pharaoh was hardened, and he did not let the people go.

The heart

Bible References

The heart

Romans 9:18
So then he has mercy on whom he will, and whom he will, he hardens.