A person who is not a mujtahid should follow whichever one he likes of the four Madhhabs. But, when doing an act in accordance with a certain Madhhab, he has to observe all the conditions required by that Madhhab for it to be sahih. If he does not observe even one of the conditions, his act will not be sahih; it has been stated unanimously that such an act will be in vain (batil). Though it is not a must for him to believe that his Madhhab is superior, it will be good if he believes so. Talfiq, that is, to do any 'ibada or any act in accordance with the rules of more than one Madhhab that disagree with one another or, to put it more clearly, to select eclectically those rules of these Madhhabs which disagree with one another in performing that 'ibada, means to go out of the four Madhhabs and to make up a fifth Madhhab. This 'ibada will not be sahih in any of the Madhhabs mixed with one another; it will be in vain and will mean to make a game of Islam. For example, if some najasa has been dropped into a certain amount of water of less than hawd kabir and more than qullatain and if the color, taste or odor of the water has not changed and if a person performs ablution with this water without intending formally (niyya) to perform an ablution and if he does not wash certain parts of his body in the prescribed succession and if he does not rub his hands against them and if he does not wash them one right after another and if he begins his ablution without saying the Basmala, his ablution will not be sahih according to any of the four aimmat al-madhhahib. He who says that it is sahih will have made up a fifth Madhhab. Even a mujtahid cannot give a fifth opinion disagreeing with the unanimity of the four Madhhabs. [The amount of water equaling a qullatain was explained in detail in the seventh chapter of the fourth fascicle of the book Endless Bliss.] Sadr ash-Sharia writes in his book Tawdih, "When two different views concerning something were transmitted from the Sahabat al-kiram, the posterior 'ulama' were not permitted to propose a third one according to unanimity. There are also those (scholars) who said that the 'ulama' of every century would be like the Sahabat al-kiram." Molla Khusraw (rahmat-Allahi ta'ala 'alaih) wrote in his work Mirat al-usul, "When two different views about doing something were transmitted from the scholars of the first century, it was not permissible, according to ijma', to give a third view. It is sahih to say that the 'ulama' of every century were like the as-Sahabat al-kiram." Jalal ad-din al-mihalli, the first author of the tafsir book al-Jalalain, says in the commentary to Jam' al-Jawami' by as-Suyuti, "It is haram to disagree with ijma'. It is prohibited in Qur'an al-karim. For this reason, it is haram to express a third opinion about something on which the Salaf as-salihin disagreed."