Matthew Poole and continuators on 1 Samuel 30:2

2 And had taken the women captives that were therein: they slew not any , either great or small, but carried them away, and went on theIr way.

Which was strange, considering how David dealt with them, chap. 27. 9. But this must be ascribed partly to their selfish or fleshly Interest: for they might reserve them, either to make Sale of them for their Profit, or to abuse them for their Lust; or, it may be, to revenge themselves upon David and his men, by reserving them to extraordinary, and lingring, and repeated punishments; but principally, to Gods over-ruling and wonderful Providence, who set these bounds to their Rage; and though he designed to chastise David's sin and folly, yet would not deliver him nor his up to death.