Quote  Category: Qur'an “What I have forbidden to you, avoid; what I have ordered you [to do], do as much of it as you can. It was only their excessive questioning and their disagreeing with their Prophets that destroyed those who were before you.” - Prophet Muhammad (570-632) Sayings of Muhammad. by Prof. Ghazi Ahmad - Arabian, b. Mecca, son of Abdallah, descended of Ishmael. Email this quote to a friend! If there is an error in this quote please let us know. Famous Quotes © ® All rights reserved.