If an Imam (the one who leads congregational

Q 6: If the Imam (the one who leads congregational Prayer) made a mistake and one of those praying behind him drew his attention to it by saying, "You have done an extra Rak`ah (unit of prayer)" or "You have missed a Rak`ah," what is the ruling concerning the Salah (Prayer) of this follower? It is worth mentioning that the follower did not know the ruling on how to alert an Imam?

A: If an Imam makes a mistake, one of those offering the Salah behind him should draw his attention to it, in the correct way legislated by the Shari`ah (Islamic law) by saying, "Subhana Allah (Glory be to Allah)." However, if they speak, as was mentioned in the question, (Part No. 7; Page No. 129) not knowing the ruling or doing so forgetfully, their Salah is correct.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.