What did the Prophet Muhammad (saw) say were the biggest Al-Ka`ba'ir (the great sins)?
 Narrated Anas bin Malik:                     The Prophet said, "The biggest of Al-Ka`ba'ir (the great sins) are (1) to join others as partners in worship with Allah, (2) to murder a human being, (3) to be undutiful to one's parents (4) and to make a false statement," or said, "to give a false witness."