John Gill Bible Commentary

And Absalom said to Hushai, is this thy kindness to thy friend?.... Meaning to David; though he would not mention his name, nor his title, nor even the relation of a father he stood in to him, only speaks of him as Hushai's friend: Hushai had professed great friendship to David, and David had been a friend to Hushai, had raised him to great honour in making him a counsellor, and had bestowed many favours and benefits on him, as Absalom knew full well; and therefore, to try his integrity, he puts this question, not as displeased with him, but overjoyed that such a trusty friend of David, and a wise counsellor of his, had deserted him, and come over to him and his party; nor does he mean to charge him with ingratitude, which he could not do without reproaching himself; on whom it might be justly retorted, is this thy kindness to thy father that begot thee, and has always expressed such a strong affection for thee, as to rebel against him? why wentest thou not with thy friend? with David, when he went out of Jerusalem; for Absalom knew not that Hushai had been with David, but thought he stayed behind at Jerusalem, when David fled, which made him less suspicious of him.