1 Samuel 18:13

“Therefore Saul removed him from him, etc.] From court, partly that he might be out of his sight, having such an hatred of his person that he could not bear to see him, and partly that he might be safer from any designs of his upon his life, which he might fear, because of his treatment of him: and made him his captain over a thousand; not out of respect to him, and in honour of him, but partly to cover his malice, and please the people, and partly in hope that he might be slain by the enemy at the head of his troop: and he went out and came in before the people; or at the head of them, as the Targum; he led them out to war, and returned with them in safety, with victory and in triumph, with…”

“FEARS HIM FOR HIS GOOD SUCCESS. (Sa1 18:13-16) Therefore Saul removed him from him--sent him away from the court, where the principal persons, including his own son, were spellbound with admiration of the young and pious warrior. made him captain over a thousand--gave him a military commission, which was intended to be an honorable exile. But this post of duty served only to draw out before the public the extraordinary and varied qualities of his character, and to give him a stronger hold of the people's affections.”

“Removed him from him - From his presence and court; which he did, because he feared lest David should find an opportunity to kill him, as he had designed to kill David; because his presence now made him more sad than ever his musick made him chearful: and principally, that hereby he might expose him to the greatest hazards. 1 Kings (1 Samuel) 18:18”

“removed: Sa1 18:17, Sa1 18:25, Sa1 8:12, Sa1 22:7 he went out: Sa1 18:16; Num 27:16, Num 27:17; Sa2 5:2; Psa 121:8; Saul was sensible that the Lord was departed from him; while he perceived, with evident sorrow of heart, that the Lord had given David peculiar wisdom, and that he was with him to prosper all his undertakings. This increased the disquietude of his malevolent mind, and his dread of David as a prevailing rival. he therefore removed him from his presence. This impolitic step, however, served the more to ingratiate David with the people, by affording him the opportunity of leading them forth to victory over their enemies. 1 Kings (1 Samuel) 18:14”