Sayyiduna Ka'b bin Malik (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) forbade the group whom he (peace and blessings be upon him) had sent to kill Ibn Abi al-Huqayq from killing women and children.
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16195