And if the follower is a masbuq (one who missed part of the prayer) and the Imam lapses in that which he did not catch with him, it is incumbent upon him to follow him in the prostration, whether it is before the salutation or after it. This has been narrated from 'Ata', al-Hasan, al-Nakha'i, al-Sha'bi, Abu Thawr, and the People of Opinion (Ashab al-Ra'y). Ibn Sirin and Ishaq said: He should complete [his prayer] then prostrate. Malik, al-Awza'i, al-Layth, and al-Shafi'i said: Regarding the prostration before the salutation, it is the same as our view, and regarding that which is after it, it is like the view of Ibn Sirin. This has also been narrated from Ahmad, as mentioned by Abu Bakr in "Zad al-Musafir," because it is an action outside of the prayer, so he does not follow the Imam in it, similar to another prayer. Our argument is the saying of the Prophet, peace and blessings of Allah be upon him: "So when he prostrates, you prostrate." And his saying in the hadith of Ibn Umar: "If his Imam lapses, it is upon him and upon those behind him." And because the prostration is part of the completion of the prayer, so he follows him in it, just like that which is before the salutation, and just like one who is not a masbuq; it is distinct from another prayer, for he is not a follower of him in that [other prayer].

When this is established, then when he completes his prayer, there are two narrations regarding the repetition of the prostration: First, he repeats it, because the ruling of the lapse has become binding upon him, and whatever he performed of the prostration with the Imam was [by way of] following him, so that which was binding upon him does not lapse by it, just like the final tashahhud. Second, the prostration is not binding upon him, because his Imam's prostration has perfected the prayer in his regard, and atonement was achieved by it, so he does not need a second prostration, just like the follower if he lapses alone. Al-Shafi'i has two views similar to these two narrations. If the Imam forgets the prostration, the masbuq prostrates at the end of his prayer, based on a single narration, because there has not been found from the Imam that which would perfect the prayer of the follower. If the follower lapses in that which he performs alone during his completion (qada'), he prostrates, based on a single narration, because he has become alone (munfarid), so the Imam does not bear [the lapse] on his behalf. Thus, if he lapses, then salutes with his Imam, he stands up and completes his prayer, then he prostrates after the salutation, just like the one praying alone, exactly.