Sunan Abi Dawud 1027
سنن أبي داود#1027Sahihحَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا يَعْقُوبُ بْنُ عَبْدِ الرَّحْمَنِ الْقَارِيُّ، عَنْ زَيْدِ بْنِ أَسْلَمَ، بِإِسْنَادِ مَالِكٍ قَالَ إِنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " إِذَا شَكَّ أَحَدُكُمْ فِي صَلاَتِهِ فَإِنِ اسْتَيْقَنَ أَنْ قَدْ صَلَّى ثَلاَثًا فَلْيَقُمْ فَلْيُتِمَّ رَكْعَةً بِسُجُودِهَا ثُمَّ يَجْلِسْ فَيَتَشَهَّدْ فَإِذَا فَرَغَ فَلَمْ يَبْقَ إِلاَّ أَنْ يُسَلِّمَ فَلْيَسْجُدْ سَجْدَتَيْنِ وَهُوَ جَالِسٌ ثُمَّ لْيُسَلِّمْ " . ثُمَّ ذَكَرَ مَعْنَى مَالِكٍ . قَالَ أَبُو دَاوُدَ كَذَلِكَ رَوَاهُ ابْنُ وَهْبٍ عَنْ مَالِكٍ وَحَفْصِ بْنِ مَيْسَرَةَ وَدَاوُدَ بْنِ قَيْسٍ وَهِشَامِ بْنِ سَعْدٍ إِلاَّ أَنَّ هِشَامًا بَلَغَ بِهِ أَبَا سَعِيدٍ الْخُدْرِيَّ .
Zaid b. Aslam reported on the authority of the chain of Malik:The Prophet (ﷺ) said: If one of you is in doubt about his prayer, and if he is sure that he prayed three rak'ah, he should stand and complete one rak'ah along with its prostrations. Then he should sit and recite the tashahhud. When he finishes the prayer, and there remains nothing except salutation, he should make two prostrations while he is sitting and afterwards should give the salutation. The narrator then narrated the tradition similar to that of Malik. Abu Dawud said: Similarly, this tradition has been narrated by Ibn Wahb from Malik, Hafs b. Maisarah, Dawud b. Qais and Hisham b. Sa'd. But Hisham projected it to Abu Sa'id al-Khudri
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 2:638