One Must Not Follow Imam’s Mistake
Issue No. 1284- If, owing to mistake, the imam recites tashahhud in a rak‘at which does not have tashahhud, or recites qunūt in a rak‘at which does not have qunūt, the follower should not recite tashahhud or qunūt. But, he cannot rise before the imam or go into rukū‘ before the imam. In fact, he should make the imam realise his mistake by making a sign, and if this is not possible, he should wait until the qunūt or tashahhud of the imam comes to an end, and should offer the remainder of the prayer with him.