Exodus 3:19 foretells Pharaoh's refusal — here God repeats that refusal paves the way for wonders.

Exodus 7:3 contains the identical promise to harden Pharaoh's heart and multiply wonders, directly reaffirming the plan in Exodus 11:9.

Exodus 7:4 says Pharaoh won't listen so God can judge — the identical rationale is given here.

Exodus 10:1 explains hardening to show signs — same purpose as Pharaoh not listening here.

Exodus 3:20 prophesies that God will strike Egypt with wonders; Exodus 11:9 shows these wonders multiplying as part of that fulfillment.

Romans 9:16-18 uses Pharaoh to illustrate God's sovereignty in hardening, giving theological depth to the divine purpose stated in Exodus 11:9.