Yazid bin Hurmaz says that once Najdah bin Amir wrote a letter to Sayyiduna Ibn Abbas (may Allah be pleased with them both) asking about the ruling on killing children, and also whether women used to participate in jihad along with the Prophet (peace and blessings be upon him), and whether the Prophet (peace and blessings be upon him) would assign them a share. Sayyiduna Ibn Abbas (may Allah be pleased with them both) had me write the reply to this letter. In the reply, he wrote: You have asked me whether the Prophet (peace and blessings be upon him) ever killed any child among the polytheists. So remember! The Prophet (peace and blessings be upon him) never killed any of their children, and you should not kill anyone either. However, if you come to know about a child in the same way as Khidr (peace be upon him) came to know about the child whom he killed, then that is a different matter (and this is not possible for you). You also asked whether, if a woman or a slave participated in battle, would their share in the spoils of war be fixed? So the Prophet (peace and blessings be upon him) did not fix any share for them, but he would certainly give them something from the spoils of war.