‘Āsim reported: I asked Anas about the Qunūt (invocation in the prayer). Anas said: "It should be recited before Rukū‘." I said: "So-and-so claims that you said it should be recited after rising from Rukū‘." He replied: "He is mistaken." Then Anas narrated to us that the Prophet invoked evil on the tribe of Banu Sulaym for one month after rising from Rukū‘. He then said: "The Prophet (may Allah's peace and blessings be upon him) sent 40 or 70 reciters (men well versed in the knowledge of the Qur'an) to some pagans, who killed them, even though there was a peace pact between them and the Prophet (may Allah's peace and blessings be upon him). I never saw the Prophet hating anyone as much as he hated those pagans." Authentic hadith - Narrated by Bukhari & Muslim