1 Samuel 18:12 - Ellicott's Commentary On The Whole Bible

And Saul was afraid of David. — Even after the scenes in the royal chamber just related, David remained at Court. He looked on such manifestations of bitter hatred as simple outbursts of a temporary insanity. His loyal nature would not believe in the enduring hate of one so great and noble as Saul; but we read here that even when the king recovered from the paroxysm, he feared David. Saul was conscious that his old vigour and ability were deserting him, and in David he recognised the presence of a power he knew had once been his. Not being able, even in his sane hours, to endure the presence of one whom he too surely felt would sooner or later take his place, the king dismissed him honourably from the Court, and invested him with an important military charge. Perhaps already the dark thought which some time later (see 1 Samuel 18:17; 1 Samuel 18:25) influenced the king had entered into his unhappy mind.