Saying Takbir collectively in a loud voice

Q 5: is repeating Dhikr (Remembrance of Allah) collectively, in one voice, a practice of Sufism or Ahl-ul-Sunnah wal-Jama`ah (adherents to the Sunnah and the Muslim mainstream)?

A: Collective Dhikr is Bid‘ah (innovation in religion), because it is something that has recently been introduced into the Din (religion). The Prophet (peace be upon him) said, “Anyone who introduces something in this matter of ours (Islam) that is not from it, will have it rejected.” He (peace be upon him) also said, “Every newly-invented matter is a Bid‘ah (innovation in religion) and every Bid‘ah is a Dalalah (deviation from what is right).” It is prescribed to perform Dhikr, without doing so in unison.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.