John Gill Bible Commentary

And again, whom should I serve?.... Or "secondly" (e), a second reason is here given for serving Absalom: the first was the choice of God and the people, the second follows: should I not serve in the presence of his son? as I have served in thy father's presence, so will I be in thy presence: he signifies, that as the kingdom was not translated into another family, but continued in succession in David's house, the alteration made was of no great consequence; it was indifferent to him whom he served, the father or the son; and he could as freely, and would as faithfully serve the son as the father; nor did he think it any breach of friendship to David, nor would David resent it, that he should serve his son, and do the best offices, and give him the best counsel he could; and he seems to bespeak the office of a counsellor, in which he had been to David, that he might be admitted into the presence of Absalom, and be of his privy council, and have the opportunity of giving his best advice. (e) "secunda", Montanus, Munster, Vatablus; "secundo", Junius & Tremellius, Piscator.