I have prayed behind a qadiyani twice without knowing that it was prohibited. Do i have to repeat my salat or not?
Al-jawab billahi at-taufeeq (the answer with Allah’s guidance)
There is scholarly consensus (Ijma`) that Qadiyanis or Ahmadiis are not Muslims. So it is therefore impermissible to pray behind a Qadiyani. However, if one had prayed behind a Qadiyani knowing or not knowing will have to repeat the Salah.
This answer was collected from MuftiSays.com, based in London (UK). It is one of the fruits of Darul Uloom London. Many ‘ulama are involved in answering the Q&A on the site, including: Shaikul Hadeeth Mufti Umar Farooq Sahib, Mufti Saifur Rahman Sahib, Mufti Abdullah Patel Sahib, Maulana Qamruz Zaman Sahib, Mufti Abu Bakr Karolia Sahib.