because it is a compensation for an act of worship that is outside of it, so it is not invalidated by omitting it, just like the compensations (18) for Hajj. It is the same whether its place was after the taslim or it was (19) before it, and he forgot it, so it became after the taslim. It has been reported from Ahmad what indicates the invalidation of the prayer, and it has also been reported that he withheld judgment. Al-Athram reported from him regarding one who forgot the prostration of forgetfulness, and he said: "If it was during a minor act of forgetfulness, I hope there is no harm [in it] (20)." I said: "What if it was during something that the Prophet (peace and blessings of Allah be upon him) forgot?" He said: "Ah." And he did not answer, then it reached me from him that he recommends repeating it. If this is the case for forgetfulness, then it is even more applicable to intentional omission.

218 - Issue; he said: (And if (1) he forgets four prostrations from four rak'ahs, and he remembers while he is in the tashahhud, he performs one prostration, it counts for him as a rak'ah, and he performs three rak'ahs, and he prostrates for forgetfulness according to one of the two narrations from Abu Abd Allah, may Allah have mercy on him. The other narration says: "It is as if this person is playing, he begins the prayer from its beginning.")

This issue is based on one who omits a pillar (rukn) of a rak'ah and does not remember it until he is in the one after it. We have already mentioned that if he does not remember it until he has started reciting in the one after it, it is invalidated. When he started reciting the second one here before remembering the prostration of the first, the first was invalidated. When he started reciting the third before remembering the prostration of the second, the second was invalidated; likewise, the third is invalidated by starting the recitation of the fourth. Nothing remains except the fourth, and he has not performed in it but one prostration, so he performs the second when he remembers, and it completes a rak'ah for him, and he performs three rak'ahs. This is the opinion of Malik and Al-Layth, because every rak'ah was invalidated by his starting the second before completing the first. There is another narration from Ahmad that his prayer is invalidated and he restarts it; because this leads to him being someone who is playing with his prayer, then he would need to cancel a large amount of work in the prayer, for between the takbirat al-ihram