Now Ahab had seventy sons in Samaria. So Jehu wrote letters and sent them to Samaria, to the rulers of the city, to the elders, and to the guardians of the sons of Ahab, saying,
We left Jehu in quiet possession of Jezreel, triumphing over Joram and Jezebel; and we must now attend his further motions. He knew the whole house of Ahab must be cut off, and therefore proceeded in this bloody work, and did not do it deceitfully, or by halves, Jer 48:10. I. He got the heads of all the sons of Ahab cut off by their own guardians at Samaria.
Commenting on 2 Kings 10:1-14
And Ahab had seventy sons in Samaria,.... These might not be all his immediate sons, but some of them his grandsons, as such are sometimes called in Scripture: and Jehu wrote letters, and sent to Samaria, unto the rulers of Jezreel; who fled thither, perhaps on Jehu's coming to Jezreel, having slain Joram, being the metropolis of the kingdom, to consult about a successor, or...
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, (a) The Scripture calls them sons who are either children or nephews.