The council's decree notwithstanding, over the years a minority of Islamic scholars (Muhammad Abduh, Rashid Rida, Mahmud Shaltut, Syed Ahmad Khan, Fazl al-Rahman, Muhammad Sayyid Tantawy and Yusuf al-Qaradawi) have questioned whether "riba" includes all interest payments. Others (Muhammad Akran Khan) have questioned whether "riba" is a crime like murder and theft, forbidden by sharia (Islamic law) and subject to punishment by human beings, or simply a sin to be inveighed against, with the reprimand left to God, since "neither the Prophet nor the first four caliphs nor any subsequent Islamic government ever enacted any law against "riba"."