Exodus 12:12 specifies that the Lord will strike all firstborn and judge Egypt's gods, expanding on the announcement here.

Exodus 12:23 adds the Passover protection detail: the blood on doorposts causes the destroyer to pass over, not strike.

Exodus 12:29 records the direct fulfillment — at midnight the Lord struck all firstborn in Egypt as announced.

In Exodus 9:15, God says he could have struck with pestilence — now he will actually strike the firstborn, showing escalation from restraint to full judgment.

In Exodus 10:29, Moses says he will not see Pharaoh again — then delivers the final warning, fulfilling that statement.

In Exodus 10:4, a plague announcement with 'tomorrow' — similar pattern but for locusts, not the final plague.

In Psalm 105:36, the striking of firstborn is recalled poetically — a later witness to the event.

Amos 4:10 references a pestilence 'after the manner of Egypt', using the exodus plague as a pattern for judgment.

Amos 5:17 uses the same phrase 'I will pass through your midst' from Exodus, signaling divine judgment.

Job 34:20 describes sudden death at midnight by no human hand, echoing the divine judgment on Egypt.