Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
nasai-kubra:593ʿAmr b. ʿUthmān > Baqiyyah > al-Awzāʿī > Yaḥyá > ʿIyāḍ b. Abū Zuhayr > Abū Saʿīd al-Khudrī

[Machine] The Messenger of Allah ﷺ said, "If anyone of you becomes uncertain during his prayer whether he has completed it or missed out something, he should perform two prostrations while sitting." Ikrimah bin Ammar contradicted them.  

الكبرى للنسائي:٥٩٣أَخْبَرَنِي عَمْرُو بْنُ عُثْمَانَ عَنْ بَقِيَّةَ عَنِ الْأَوْزَاعِيِّ عَنْ يَحْيَى أَنَّ عِيَاضَ بْنَ أَبِي زُهَيْرٍ حَدَّثَهُ قَالَ سَمِعْتُ أَبَا سَعِيدٍ الْخُدْرِيِّ يَقُولُ

قَالَ رَسُولُ اللهِ ﷺ «إِذَا سَهَا أَحَدُكُمْ فِي صَلَاتِهِ فَلَا يَدْرِي زَادَ أَوْ نَقَصَ فَلْيَسْجُدْ سَجْدَتَيْنِ وَهُوَ جَالِسٌ» خَالَفَهُمْ عِكْرِمَةُ بْنُ عَمَّارٍ  


See similar narrations below:

Collected by Nasāʾī's Kubrá, Suyūṭī
nasai-kubra:592Shuʿayb b. Shuʿayb b. Isḥāq > ʿAbd al-Wahhāb > Shuʿayb > al-Awzāʿī > Yaḥyá > ʿIyāḍ b. Abū Zuhayr > Abū Saʿīd

[Machine] The Messenger of Allah ﷺ said, "If one of you makes a mistake in his prayer and does not know whether he has added or missed something, he should perform two prostrations of forgetfulness while sitting." The rest of them disagreed with him.  

الكبرى للنسائي:٥٩٢أَخْبَرَنِي شُعَيْبُ بْنُ شُعَيْبِ بْنِ إِسْحَاقَ قَالَ حَدَّثَنَا عَبْدُ الْوَهَّابِ قَالَ حَدَّثَنَا شُعَيْبُ قَالَ حَدَّثَنَا الْأَوْزَاعِيُّ قَالَ حَدَّثَنِي يَحْيَى أَنَّ عِيَاضَ بْنَ أَبِي زُهَيْرٍ حَدَّثَهُ قَالَ سَمِعْتُ أَبَا سَعِيدٍ يَقُولُ

قَالَ رَسُولُ اللهِ ﷺ «إِذَا سَهَا أَحَدُكُمْ فِي صَلَاتِهِ فَلَا يَدْرِي زَادَ أَوْ نَقَصَ فَلْيَسْجُدْ سَجْدَتَيْنِ وَهُوَ جَالِسٌ» خَالَفَهُ بَقِيَّةُ  

suyuti:2020a
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السيوطي:٢٠٢٠a

"إذا سَهَا أحدُكم في صلاتِه فلا يدْرى أزَادَ أمْ نقصَ؟ فليسْجدْ سجْدتين وهُوَ جَالِسٌ، ثُمَّ يُسَلِّم" .  

[ق] البيهقى في السنن وابن عساكر عن أبي هريرة