2 Kings 10:1
And Ahab had seventy sons in Samaria. And Jehu wrote letters, and sent to Samaria, unto the rulers of Jezreel, to the elders, and to them that brought up Ahab’s children, saying,
Cross-reference
1 Kings 21:8–14
Parallel
1 Kings 21:8-14 shows Jezebel sending letters to elders to kill Naboth; Jehu uses the same letter tactic to kill Ahab's sons.
2 Chronicles 22:9
Historical context
2 Chronicles 22:9 recounts Jehu killing Ahaziah, part of the same purge of Ahab's house that begins with the seventy sons.
1 Kings 21:21
Prophetic fulfillment
In 1 Kings 21:21, Elijah prophesied the destruction of every male in Ahab's house. Jehu's letter targeting Ahab's seventy sons initiates that fulfillment.
1 Kings 21:29
Prophetic fulfillment
In 1 Kings 21:29, God delayed Ahab's punishment to his son's days. Jehu's actions against Ahab's sons now fulfill that delayed judgment.