John Gill

For if a man find his enemy, will he let him go well away?.... Or "in a good way" (e), in peace and safety, without doing him any hurt; this is not usual among men, and yet this was the present case; David had found his enemy Saul, which Saul tacitly owns, and yet had let him go well away from him, without hurting him: wherefore the Lord reward thee good for that thou hast done unto me this day; he does not promise to reward him himself, but prays the Lord to reward him; and had he been sincere in it, he could not have done better for him. Some connect the former clause with this, after this manner, "if a man find his enemy, and let him go away, the Lord will reward him, the Lord reward thee", &c. so the Syriac and Arabic versions. (e) "in via bona", Pagninus, Montanus.