Maliks Muwatta Book 021, Hadith Number 009.

Section : Prohibition against Killing Women and Children in Military Expeditions.

Yahya related to me from Malik from Nafi from Ibn Umar that the Messenger of Allah, may Allah bless him and grant him peace, saw the corpse of a woman who had been slain in one of the raids, and he disapproved of it and forbade the killing of women and children.