Matthew Henry on 2 Kings 10:1-14
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. Seventy sons (or grandsons) Ahab had, Gideon's number, Jdg 8:30. In such a number that bore his name his family was likely to be perpetuated, and yet it is extirpated all at once. Such a quiver full of arrows could not protect his house from divine vengeance. Numerous families, if vicious, must not expect to be long prosperous. These son…
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A fenced city also - All here seems to refer to Samaria alone; in it were the magazines and implements of war, etc. No reader need be told that these letters were all ironical. It was the same as if he had said, "Ye have no means of defense; Israel is with me: if you yield not up yourselves and the city, I will put you all to the sword.
John Gill on 2 Kings 10:2
Now as soon as this letter cometh to you, seeing your master's sons are with you,.... Sons of Ahab, and some of Joram, and all either the sons or grandsons of Ahab:
and there are with you chariots and horses; military ones:
a fenced city also: as Samaria was, well walled and fortified, and able to hold out a long siege:
and armour; of all sorts, to arm themselves and people with in their defence.
Keil & Delitzsch on 2 Kings 10:1-3
Extermination of the Seventy Sons of Ahab in Samaria. - Kg2 10:1-3. As Ahab had seventy sons in Samaria (בּנים in the wider sense, viz., sons, including grandsons see at Kg2 10:13, as is evident from the fact that אמנים, foster-fathers, are mentioned, whereas Ahab had been dead fourteen years, and therefore his youngest sons could not have had foster-fathers any longer), Jehu sent a letter to the elders of the city and to the foster-fathers of the princes, to the effect that they were to place one of the sons of their lord upon the throne. There is something very strange in the words הזּקנים יזרעאל אל־שׂרי, "to the princes of Jezreel, the old men," partly on account of the name Jezreel, and…