The Prophet (ﷺ) sent Khalid bin Al-Walid to the tribe of Jadhima and Khalid invited them to Islam but
they could not express themselves by saying, "Aslamna (i.e. we have embraced Islam)," but they
started saying "Saba'na! Saba'na (i.e. we have come out of one religion to another)." Khalid kept on
killing (some of) them and taking (some of) them as captives and gave every one of us his Captive.
When there came the day then Khalid ordered that each man (i.e. Muslim soldier) should kill his
captive, I said, "By Allah, I will not kill my captive, and none of my companions will kill his captive."
When we reached the Prophet, we mentioned to him the whole story. On that, the Prophet (ﷺ) raised both
his hands and said twice, "O Allah! I am free from what Khalid has done."
Sahih al-Bukhari Book 64, Hadith 368