Bukhari :: Book 9 :: Volume 89 :: Hadith 299
Narrated Ibn 'Umar:
The Prophet sent (an army unit under the command of) Khalid bin Al-Walid to fight against the tribe of Bani Jadhima and those people could not express themselves by saying, "Aslamna," but they said, "Saba'na! Saba'na! " Khalid kept on killing some of them and taking some others as captives, and he gave a captive to everyone of us and ordered everyone of us to kill his captive. I said, "By Allah, I shall not kill my captive and none of my companions shall kill his captive!" Then we mentioned that to the Prophet and he said, "O Allah! I am free from what Khalid bin Al-Walid has done," and repeated it twice.
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