‏الصلاة : Hadeeth No:1440 Anas b. Malik reported that the Messenger of Allaah (sallAllaahu alayhi wa sallam) observed Qunut for one month Invoking curse upon Ri'l, Dhakwan, 'Usayya. those who disobeyed Allaah and His Messenger (sallAllaahu alayhi wa sallam)....

‏الإيمان : Hadeeth No:126 It is narrated on the authority of Abdullah b. Umar that the Prophet (may peace and blessings be upon him) observed on the occasion of the Farewell Pilgrimage Woe unto you distress unto you! Don't turn back as unbelievers after me by striking the necks of one another....