2 Kings 10:1-2

Now Ahab had seventy sons in Samaria. And Jehu wrote letters, and sent to Samaria, unto the rulers of Jezreel, even the elders, and unto them that brought up the sons of Ahab, saying, And now as soon as this letter cometh to you, seeing your master’s sons are with you, and there are with you chariots and horses, a fortified city also, and armor