In examining the history of Islamic sects, we encounter a suspicion that says that ‎with the death of Ismail, the oldest son of Imam Sadiq, and Sayyid Muhammad, ‎the oldest son of Imam Hadi, the position of Imamate was transferred to their ‎younger brothers, Imam Kazim and Hazrat Askari. This statement has become the ‎origin of the emergence of the Ismaili and Muhammadi sects in Shiite history.‎

And in the present era, some authors, such as Mr. Modarresi, have exaggerated it ‎in his book "School in the Process of Evolution" and have created the suspicion of ‎‎"bada in the Imamate". we have examined the validity of this claim using a ‎descriptive-analytical method. Considering the meaning of bada' in the dictionary, ‎the Quran, and the hadiths, it is concluded that although belief in "bada'" is ‎considered an important Shiite belief principle that indicates God's power and ‎authority to change destinies,but due to the mention of the names and number of ‎the pure Imams in the Shia and Sunni mutawatir documents and even in previous ‎divine books, no change has taken place in the person of the Twelve Imams.‎