Adam Clarke on 1 Samuel 24:19

If a man find his enemy, will he let him go well away? - Or rather, Will he send him in a good way? But Houbigant translates the whole clause thus: Si quis, inimicum suum reperiens, dimittit eum in viam bonam, redditur ei adomino sua merces; "If a man, finding his enemy, send him by a good way, the Lord will give him his reward." The words which are here put in italic, are not in the Hebrew text, but they are found, at least in the sense, in the Septuagint, Syriac, and Arabic, and seem necessary to complete the sense; therefore, adds Saul, the Lord will reward thee good for what thou hast done unto me.