Exodus 9:35
And the heart of Pharaoh was hardened, neither would he let the children of Israel go; as the Lord had spoken by Moses.
Cross-references
Exodus 4:21
Prophetic fulfillment
Exodus 4:21 is where God first declares He will harden Pharaoh's heart — this verse records the fulfillment of that promise.
Exodus 10:1
Historical context
In Exodus 10:1, God reveals that He hardened Pharaoh's heart specifically to display His signs — giving the divine purpose behind the hardening just described.
Amos 4:10
Parallel
Amos 4:10 recalls the plagues of Egypt as a warning to Israel — highlighting that even such judgments did not lead to repentance, similar to Pharaoh's hardness here.