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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bayhaqi:3834 – Abū ʿAbdullāh al-Ḥāfiẓ > Abū Bakr b. ʿAbdullāh > al-Ḥasan b. Sufyān > ʿAbdullāh b. al-Rūmī > ʿUmar b. Yūnus > ʿIkrimah b. ʿAmmār > Yaḥyá b. Abū Kathīr > Abū Salamah b. ʿAbd al-Raḥman > Abū Hurayrah

[Machine] The Messenger of Allah ﷺ said, "If one of you forgets to recite an increase or decrease while in prayer, then let him make two prostrations while sitting, then he should say the salutation." And likewise.  

البيهقي:٣٨٣٤ – أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أَخْبَرَنِي أَبُو بَكْرِ بْنُ عَبْدِ اللهِ أنبأ الْحَسَنُ بْنُ سُفْيَانَ ثنا عَبْدُ اللهِ بْنُ الرُّومِيِّ ثنا عُمَرُ بْنُ يُونُسَ ثنا عِكْرِمَةُ بْنُ عَمَّارٍ ثنا يَحْيَى بْنُ أَبِي كَثِيرٍ قَالَ حَدَّثَنِي أَبُو سَلَمَةَ بْنُ عَبْدِ الرَّحْمَنِ قَالَ حَدَّثَنِي أَبُو هُرَيْرَةَ ؓ قَالَ

قَالَ رَسُولُ اللهِ ﷺ إِذَا سَهَا أَحَدُكُمْ فَلَمْ يَدْرِ أَزَادَ أَوْ نَقَصَ فَلْيَسْجُدْ سَجْدَتَيْنِ وَهُوَ جَالِسٌ ثُمَّ يُسَلِّمُ وَكَذَلِكَ  

رَوَاهُ مُحَمَّدُ بْنُ مَرْزُوقٍ عَنْ عُمَرَ بْنِ يُونُسَ وَكُلُّ ذَلِكَ مُوَافِقٌ لِلرِّوَايَةِ الثَّانِيَةِ عَنْ عَطَاءِ بْنِ يَسَارٍ عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ عَنِ النَّبِيِّ ﷺ