The Duty of One who has Bent for Ruku before Imam
Issue No. 1282- If a follower goes to rukū‘ before the imam by mistake and the situation is such that if he raises his head he may hear some part of the qarā'ah (recitation) of the imam, he should raise his head and go to rukū‘ with the imam and his prayer is in order. If he realises that he will not reach anything of the qarā'ah of the imam, the obligatory precaution is that he should raise his head and finish the prayer with the imam and then offer the prayer again.