John Gill Bible Commentary

And the damsel was very fair,.... And so very agreeable to the king to be in his presence, and wait upon him, and take things of her hand, as well as lie with him: and cherished the king; enlivened his spirits by her amiable countenance, her graceful behaviour, and tender care of him, and especially by bedding with him: and ministered to him; serving him with her own hands whatever he took for his sustenance: but the king knew her not; as a man knows his wife; which shows that she was his wife, and that it would not have been criminal in him had he known her; but this is observed, not to point at the chastity of David, but his feebleness, and loss of desire after women, and that the damsel remained a virgin; and that was the ground of Adonijah's request, and his hope of succeeding.