It is narrated from the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), that the Messenger of Allah (peace and blessings be upon him) said: "There are six people whom I have cursed, and Allah has also cursed them, as has every prophet whose supplication is answered: the one who denies the decree of Allah; the one who adds to the Book of Allah; the one who gains dominance through power and tyranny in order to humiliate the one whom Allah has honoured and to honour the one whom Allah has humiliated; the one who treats as lawful what Allah has made sacred; the one who treats as lawful, concerning my family and descendants, what Allah has made unlawful; and the one who abandons my Sunnah." This hadith is sahih (authentic) on the condition of Imam Bukhari, but the two Shaykhs did not record it.