Imam Awza'i, may Allah have mercy on him, said: Umar bin Abdul Aziz, may Allah have mercy on him, wrote that in the Book of Allah, no one's opinion is acceptable, and the opinions of the esteemed Imams will be accepted only in matters where nothing is found in the Book of Allah or the Sunnah of the Messenger of Allah, peace and blessings be upon him. And in the Sunnah which the Messenger of Allah, peace and blessings be upon him, has established, there is no room for opinion.