Abu Qatada said

We went out with Allah's Messenger ﷺ in the year of Hunain, and when the armies met, the Muslims suffered a reverse. I saw one of the polytheists getting the better of one of the Muslims, so I struck him with my sword from behind on his shoulder-blade and cut his coat of mail. He came at me and closed with me, so that I felt death was near, but he was overtaken by death and let me go. I then caught up on ‘Umar b. al-Khattab and asked him what was the matter with the people, to which he replied that it was what Allah had commanded.1 Then they returned and the Prophet (ﷺ) sat down and said, "If anyone kills a man and can prove it he will get his spoil.” I said, "Who will testify for me?” and then sat down. The Prophet (ﷺ) said the same again and I said, "Who will testify for me?”2 and then sat down. Again the Prophet (ﷺ) said the same and I stood up He asked, "What is the matter with you, Qatada?” and when I informed him a man said, "He has spoken the truth. I have his spoil, so make him agreeable to take something in exchange.” Abu Bakr said, “In that case I swear by Allah that he did not do so. One of Allah’s heroes3 does not fight for Allah and His Messenger and then give you his spoil.” The Prophet (ﷺ) said he had spoken the truth and told the man to hand it over to me. He did so, and I bought a garden among the B. Salima. This was the first property I acquired in the Islamic period. 1. He wondered why the Muslims had fled from the enemy, and 'Umar replied that it was what Allah had decreed. 2. There is doubt as to whether Abu Qatada spoke aloud the first two times, or inwardly. In the translation I have kept strictly to the wording in the Arabic. (Bukhari and Muslim.)