As the Muslims are instructed to obey their leaders and emulate them in that which does not involve disobedience to Allah (may He be exalted), whether they are leaders in the sense of rulers and caliphs, or leaders who lead the people in prayer, it is only fair that the Muslim should not be held to account for mistakes made by his leader, because he has done what is required of him, which is following the leader, provided that no sin is involved. Hence in this hadith, the Prophet (blessings and peace of Allah be upon him) explains to those who pray behind an imam that when the leaders pray, they either pray properly, or they make mistakes in the prayer. If they do the prayer properly, as it should be done, then both they and those who pray behind them will have the reward for that, but if they make mistakes and do not lead the prayer properly, as it should be done, then the burden of sin for the mistakes they have made is theirs alone, and those who pray behind them will have the reward of the prayer. What is meant by mistake here is not that which is done deliberately, for if a person makes a mistake that is beyond his control, he will not be held to account for it. Rather what is meant by mistake here is the opposite of that which is right and proper, such as introducing an innovation that was not enjoined by Allah, or deliberately going against what Allah has enjoined, on the basis of whims and desires, and so on. This hadith indicates that it is permissible to pray behind any Muslim, whether he is a righteous man or an evildoer..