During the Salah (Prayer), he mistakenly

Q 3: An Imam (the one who leads congregational Prayer) made a mistake in the Salah (Prayer) and then a man came and joined the congregation in the fourth Rak‘ah (unit of Prayer) and followed the Imam when he performed Sujud-ul-Sahw (Prostration of Forgetfulness). Is it obligatory on a latecomer to perform Sujud-ul-Sahw with the Imam or not? A: If the Imam performs Sujud-ul-Sahw for making mistake unintentionally, the latecomer should perform Sujud-ul-Sahw with him. This should be done before standing up to complete anything that was missed in the Salah. If the Imam does not perform Sujud-ul-Sahw, the Ma’mums (persons being led by an Imam in Prayer) do not have to perform it, because they are following the Imam in compliance with the saying of the Prophet (peace be upon him): “The Imam is appointed to be followed.” (Part No. 6; Page No. 28

A: If the Imam performs Sujud-ul-Sahw for making mistake unintentionally, the latecomer should perform Sujud-ul-Sahw with him. This should be done before standing up to complete anything that was missed in the Salah. If the Imam does not perform Sujud-ul-Sahw, the Ma’mums (persons being led by an Imam in Prayer) do not have to perform it, because they are following the Imam in compliance with the saying of the Prophet (peace be upon him): “The Imam is appointed to be followed.” (Part No. 6; Page No. 28) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.