It is narrated from Abu Burdah (may Allah be pleased with him) that he said: I was standing in the market during the governorship of Ziyad when, in amazement, I suddenly struck one of my hands against the other. A man from the Ansar - whose father was a Companion of the Messenger of Allah - asked: O Abu Burdah, what are you amazed at? I said: I am astonished at people whose religion is one, whose Prophet is one, whose call is one, whose Hajj and jihad are one, and yet they consider it lawful to shed one another's blood. He said: Do not be amazed, for I heard my father say that he heard the Messenger of Allah (peace and blessings be upon him) say: "Indeed, this Ummah of mine is an Ummah that has been shown mercy; in the Hereafter there is no reckoning and no punishment upon it. Its punishment has been placed only (in this world) in the form of killing, earthquakes and trials." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.