Exodus 8:15 records the same hardening after the frog plague—Pharaoh's repeated pattern of relenting then hardening when relief comes.

Exodus 4:21 prophesied that God would harden Pharaoh's heart—here Pharaoh hardens his own, fulfilling that prediction in a complex way.

Exodus 7:13 shows Pharaoh's heart hardened after the first plague—the same stubborn refusal repeats throughout the plagues.

Exodus 7:14 first mentions Pharaoh's hardened heart, the same condition described here after the plague of flies.

Exodus 9:7 records another instance of Pharaoh's heart being hardened after the plague on livestock, continuing the same pattern.

Romans 2:5 warns that a hard and impenitent heart stores up wrath—exactly what Pharaoh's stubbornness brought upon him.

2 Chronicles 36:13 explicitly says Zedekiah hardened his heart against God—a direct parallel to Pharaoh's stubborn refusal.

Isaiah 63:17 asks why God hardens hearts—contrasting Pharaoh's self-hardening here, yet both address the mystery of divine and human agency in hardening.

Ecclesiastes 8:11 explains why Pharaoh hardens his heart: delayed punishment emboldens the wicked to persist in evil.

Isaiah 26:10 shows that even when God shows favor (removing plagues), the wicked do not learn righteousness—Pharaoh's exact pattern.

Acts 28:27 describes hearts grown dull and eyes closed—mirroring Pharaoh's hardened heart that prevents him from turning to God.