Ruling on reciting the Talbiyah in unison
Question

                What is the ruling on pilgrims reciting the Talbiyah in unison, where one recites it and the others repeat after him?.
Praise be to Allah.
    That is not permissible because it is not narrated that the 
    Prophet  (peace and blessings of Allaah be upon him) or any of the 
    Rightly Guided Caliphs (may Allaah be pleased with them) who succeeded him 
    did that; rather it is a bid’ah (innovation). 

    And Allaah is the Source of strength. May Allaah send 
    blessings and peace upon our Prophet Muhammad and his family and companions. 
    End quote. 

    Standing Committee for Academic Research and Issuing Fatwas 

    Shaykh ‘Abd al-‘Azeez ibn ‘Abd-Allaah ibn Baaz, Shaykh ‘Abd 
    al-Razzaaq ‘Afeefi, Shaykh ‘Abd-Allaah ibn Qa’ood. 

    Fataawa al-Lajnah al-Daa’imah li’l-Buhooth al-‘Ilmiyyah 
    wa’l-Ifta (11/358) 
See also the answer to question no.
    33746.