This haftarah opens with David, near death, charging Solomon to be strong, to act like a man, and to keep God's ways, walking in obedience to the law of Moses so that Solomon's own reign and his descendants after him would prosper and the promise of an enduring dynasty would hold.
David then turns to more specific, practical instructions concerning matters he had been unable to settle fully in his own lifetime: dealing with Joab, his own military commander, for bloodshed committed years earlier during peacetime, and showing kindness instead to the sons of Barzillai, who had supported David during a period of exile and hardship, alongside a final instruction concerning Shimei, a man who had cursed David during an earlier crisis and whom David had sworn not to harm personally but did not extend that protection to Solomon's own judgment.
The haftarah closes with David's death after forty years as king, and the notice that Solomon sat securely on his father's throne, his kingdom firmly established, closing the account of David's reign and opening the account of Solomon's.
David's specific mention of Barzillai's sons, owed kindness for support given during a period of exile rather than for any grand political service, adds a quieter note to the haftarah, a reminder that loyalty shown during hardship, not only military victory, is what David wants remembered and rewarded once he is gone.