2 Kings 10:6
Then he wrote a letter the second time to them, saying, If ye be mine, and if ye will hearken unto my voice, take ye the heads of the men your master’s sons, and come to me to Jezreel by to morrow this time. Now the king’s sons, being seventy persons, were with the great men of the city, which brought them up.
Cross-reference
In 2 Kings 10:14, Jehu likewise orders a mass execution — here of Ahaziah's relatives — continuing his purge.
In 1 Kings 21:8-11, Jezebel writes letters commanding elders to kill Naboth — the same officials Jehu later writes to command killing Ahab's sons.
In Job 21:19, the idea that God stores punishment for children is stated — Jehu's killing of Ahab's sons exemplifies this generational judgment.
In Isaiah 14:21, preparing to kill sons for fathers' sins mirrors Jehu's execution of Ahab's sons for their father's sins.
In Revelation 2:20-23, Jesus threatens to kill 'Jezebel's children' — a typological judgment echoing Jehu's killing of the literal Jezebel's sons.
In 1 Kings 19:17, Elijah is told Jehu will kill the remnant — here Jehu fulfills that prophecy by executing Ahab's sons.
In 1 Kings 21:11, Jezebel's letter commands the elders to kill Naboth — Jehu's letter mirrors this same method against her own family.
In Joshua 7:24, Achan's family is punished with him — similar collective punishment as Ahab's 70 sons killed for their father's sins here.