If a Follower Knows That the Prayer of the Imam Is Void, He Cannot Follow Him
Issue No. 1246- If a follower knows that the prayer of the imam is void, like if he knows that the imam does not have wuḍū, though the imam himself may not be mindful of the fact, he cannot follow that imam. In case, however it transpires after the prayer that the imam was not a just (‘ādil) person, or was (God forbid) a disbeliever, or the prayer he led was void for any other reason, the prayer of the follower will be valid.