Muraqqa' bin Sayfi narrates from his grandfather Rabah bin al-Rabi' (may Allah be pleased with him), the brother of Hanzalah the scribe (may Allah be pleased with him), (that he said): I went out with the Messenger of Allah (peace and blessings be upon him) on a military expedition, and Khalid bin al-Walid (may Allah be pleased with him) was in command of the vanguard. Rabah (may Allah be pleased with him) and the Companions (may Allah be pleased with them) passed by a slain woman whom the vanguard had killed. They stood looking at her, marvelling at her physique, until the Messenger of Allah (peace and blessings be upon him) also arrived on his she-camel. The narrator says: The Companions (may Allah be pleased with them) moved away from the woman. The Messenger of Allah (peace and blessings be upon him) stood beside her, then he (peace and blessings be upon him) said: "Was this one fighting?" Then he (peace and blessings be upon him) looked at the faces of the people and ordered one of them: "Go and tell Khalid bin al-Walid that he must not kill any child or hired servant."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18157