Verse 11. "How much more" - Here are several things which aggravated the guilt of those wicked men. 1. Ish-bosheth was an innocent man, and therefore none could have any ground of quarrel against him. 2. He was in his own house, which was his sanctuary, and none but the worst of men would disturb him there. 3. He was upon his bed, resting in the heat of the day, and so free from suspicion that he was not even attended by his guards, nor had he his doors secured. To take away the life of such a man, in such circumstances, whom also they professed to hold as their sovereign, was the most abandoned treachery.
Verse 12. "And they slew them" - None ever more richly deserved death; and by this act of justice, David showed to all Israel that he was a decided enemy to the destruction of Saul's family; and that none could lift up their hands against any of them without meeting with condign punishment. In all these cases I know not that it was possible for David to show more sincerity, or a stricter regard for justice.