Sahih Muslim | Book 22 | Hadith Number 4876
Narrated by Abu Tufail 'Amir b. Withila
Abu Tufail 'Amir b. Withila reported: I was in the company of 'Ali b. Abi Talib, when a person came to him, and said: What was it that Allah's Apostle (may peace be upon him) told you in secret? Thereupon he (Hadrat 'Ali) was enraged and said: Allah's Apostle (may peace be upon him) did not tell me anything in secret that he hid from people, except that he told me four things. He said: Commander of Faithful, what are these? He said: Allah cursed him who cursed his father; Allah cursed him who sacrificed for anyone besides Allah; and Allah cursed him who accommodates an innovator (in religion) ; and Allah cursed him who changed the minarets (the boundary lines) of the land.