It is narrated from Hazrat Mujahid (may Allah have mercy on him) that the Holy Prophet (peace and blessings be upon him) sought consultation regarding the prisoners of the Battle of Badr. Hazrat Abu Bakr Siddiq (may Allah be pleased with him) said: O Messenger of Allah (peace be upon him), these are your people and your relatives, so take ransom from them and set them free. Hazrat Umar (may Allah be pleased with him) said: Kill them all. Then regarding this, the verse of the Holy Qur'an { مَا کَانَ لِنَبِیٍّ أَنْ یَکُونَ لَہُ أَسْرَی حَتَّی یُثْخِنَ فِی الأَرْضِ } was revealed. Hazrat Mujahid says that by "illa ithkhan" is meant killing.