It is narrated on the authority of Usama b. Zaid: The Messenger of Allah may peace be upon him) sent us to Huraqat, a tribe of Juhaina. We attacked that tribe early in the morning and defeated them and I and a man from the Ansar caught hold of a person (of the defeated tribe). When we overcame him, he said: There is no god but Allah. At that moment the Ansari spared him, but I attacked him with my spear and killed him. The news had already reached the Apostle (peace be upon him), so when we came back he (the Apostle (صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ)) said to me: Usama (RA), did you kill him after he had made the profession: There is no god but Allah? I said. Messenger of Allah, he did it only as a shelter. The Prophet (صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ) observed: Did you kill him after he had made the profession that there is no god but Allah? He (the Holy Prophet (صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ)) went on repeating this to me till I wished I had not embraced Islam before that day.