Hazrat Saeed bin Abi Saeed (may Allah have mercy on him) said: Allah Almighty had already made the spoils of war lawful for you in His knowledge «لَوْلَا كِتَابٌ مِنَ اللَّهِ سَبَقَ» , if this had not been the case beforehand, you would have faced a great punishment on the day of Badr regarding the matter of the captives.