Ruling on saying Dhikr collectively between Tarawih prayers

Q 4: In Ramadan We find people in some Masjids (mosques) who invoke Allah's peace and blessings upon the Prophet, the Rightly-Guided Caliphs, the Mothers of the Believers, and the Ten Sahabah (Companions) given the glad tidings of entering Jannah (Paradise) loudly in congregation. They do this following each two Rak`ahs (units of Prayer) of Tarawih (special supererogatory night Prayer in Ramadan) in a specific order known to them. What is the ruling on this? How many Rak`ahs are there in Tarawih prayer? When is it performed? Is it performed on the night of the first or the second day of Ramadan? What is the ruling on some Imams reciting half an Ayah, one, or two short Ayahs in Tarawih and Maghrib prayer especially in Ramadan?

(Part No. 2; Page No. 529)  A: Dhikr (Remembrance of Allah) and invoking Allah's peace and blessings upon the Prophet in congregation after Fard (obligatory) or Nafilah (supererogatory) prayer, or following each two Rak`ahs of Tarawih is Bid`ah (innovation in religion). It has been authentically reported that the Prophet (peace be upon him) said, Whoever innovates anything in this matter of ours (Islam) which is not a part of it will have it rejected. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.