Exodus 11:5 repeats the threat from Exodus 4:23, specifying the scope of the firstborn plague to come — a direct narrative echo.

Exodus 12:29 records the actual execution of the plague foretold in Exodus 4:23 — the fulfillment of God's warning to Pharaoh.

Exodus 7:14 records Pharaoh's hardened heart, showing the immediate refusal that follows the warning in Exodus 4:23 — a narrative progression.

In Exodus 9:1, the same command 'Let my people go that they may serve me' is repeated, reinforcing God's demand to Pharaoh.

Psalm 78:51 recalls the plague on Egypt's firstborn as a historical act of judgment — a poetic retelling of the event threatened in Exodus 4:23.

Psalm 105:36 similarly remembers God striking Egypt's firstborn — another poetic echo of the plague predicted in Exodus 4:23.

Psalm 135:8 summarizes the plague on Egypt's firstborn — a concise poetic parallel to the threat in Exodus 4:23.

Deuteronomy 14:1 calls Israel 'sons of the LORD' — the same sonship language used in Exodus 4:23 where Israel is God's firstborn son.

Jeremiah 2:3 calls Israel 'the firstfruits of his harvest' — a parallel image to Israel as God's firstborn son in Exodus 4:23.

Malachi 1:6 asks 'If I am a father, where is my honor?' — building on the father-son relationship between God and Israel seen in Exodus 4:23.

Isaiah 63:8 says 'Surely they are my people, children' — echoing the relationship of Israel as God's son from Exodus 4:23.