1 Samuel 17:15

15. David went and returned from Saul “By this it would seem that the king’s affection towards his healer cooled as soon as the cure had been effected. The probability of this most physicians can vouch from their own experience. Besides, it is likely that, from the peculiar nature of his complaint, Saul cared not to be continually reminded, by the presence of his healer, of the sufferings he had gone through, and of paroxysms which it humbled his proud mind to think had made him an object of compassion in the eyes of his subjects. He therefore made no opposition to the application for his son’s return home, which Jesse probably made when he found that David’s services were no longer necessary.” Kitto.