Impermissibility for the Imam to consider the Tasbih of the Ma'mums when he is certain that he is right

A: If the Imam is quite sure that he is right, it is not permissible for him to consider the Tasbih (saying: "Subhan Allah [Glory be to Allah]") of those who are led by him in the prayer. Their Tasbih indicates suspicion and certainty is given privilege. What the Imam did was wrong. Nevertheless, if the Imam was ignorant of this ruling, his prayer will be valid In sha’a-Allah (if Allah wills) and so is the prayer of those who are led by him.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.