2 Kings 10:7
And it came to pass, when the letter came to them, that they took the king’s sons, and slew seventy persons, and put their heads in baskets, and sent him them to Jezreel.
Cross-reference
In 2 Kings 10:9, Jehu publicly claims responsibility for killing the king but says others killed the sons — referencing these beheadings.
2 Kings 11:1 describes Athaliah destroying royal offspring — a parallel purge, though from different motives.
Judges 9:5-57 recounts Abimelech killing his seventy brothers — a clear parallel to Jehu's slaughter of Ahab's seventy sons.
1 Kings 21:21 prophesies that every male of Ahab will be cut off — here Jehu's slaughter fulfills this judgment.
1 Kings 21:11 shows Jezebel's letter commanding Naboth's death — the same tactic of using letters to orchestrate murder as Jehu does here.
Hosea 1:4 explicitly references the blood of Jezreel and pronounces judgment on Jehu's house for this massacre — a direct prophetic commentary.
2 Samuel 4:7 also describes beheading and sending a head as proof — Ish-bosheth's head is brought to David, mirroring Jehu's receipt of Ahab's sons' heads.
2 Chronicles 21:4 records Jehoram killing his brothers — another king murdering relatives to secure power.