Narrated Ibn `Umar: During some of the Ghazawat of Allah's Apostle a woman was found killed, so Allah's Apostle forbade the killing of women and children.
Hadith Referenceصحيح البخاري / كتاب الجهاد والسير / 3015
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة