2 Samuel 4 · John Wesley
Weak - In the infancy of my kingdom, not well settled in it. The metaphor is taken from a young and tender child or plant. These men - Joab and Abishai, the sons of thy sister Zeruiah. Too hard - That is, too powerful. They have so great a command over all the soldiers, and so great favour with the people, that I cannot punish them without apparent hazard to my person and kingdom; especially, now when all the tribes, except Judah, are in a state of opposition against me. But although this might give some colour to the delay of their punishment, yet it was a fault that he did not do it within some reasonable time, both because this indulgence proceeded from a distrust of God's power and faithfulness; as if God could not make good his promise to him, against Joab and all his confederates; and because it was contrary to God's law, which severally requires the punishment of willful murderers. It was therefore carnal wicked policy, yea cruel pity that spared him. If the law had had its course against Joab, it is probable the murder of Ishbosheth, Ammon, and others, had been prevented. So truly was he in these, and some other respects, a bloody man, which may be observed to the glory of the Divine grace, in his forgiveness and conversion.
Jonathan had a son - This history is inserted as that which encouraged these men to this wicked murder, because Saul's family was now reduced to a low ebb; and if Isbosheth was dispatched, there would be none left, but a lame child, who was altogether unfit to manage the kingdom, and therefore the crown must necessarily come to David by their act and deed; for which they promised themselves no small recompense. Jezreel - The place of that last and fatal fight.
Fetched wheat - Which was laid up in publick granaries in the king's house, and was fetched thence by the captains and commanders of the army for the pay of their soldiers, who, in those ancient times were not paid in money, but in corn. Upon this pretence they were admitted into the house, and so went from room to room, to the place where the king lay.