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.
ahmad:3975Yaḥyá b. Ādam > Sufyān > Manṣūr > Ibrāhīm > ʿAlqamah > ʿAbdullāh

[Machine] The Messenger of Allah ﷺ performed a prayer, I do not know whether it was increased or decreased, then he greeted and prostrated twice.  

أحمد:٣٩٧٥حَدَّثَنَا يَحْيَى بْنُ آدَمَ حَدَّثَنَا سُفْيَانُ عَنْ مَنْصُورٍ عَنْ إِبْرَاهِيمَ عَنْ عَلْقَمَةَ عَنْ عَبْدِ اللهِ قَالَ

صَلَّى رَسُولُ اللهِ ﷺ صَلَاةً لَا أَدْرِي زَادَ أَوْ نَقَصَ ثُمَّ سَلَّمَ وَسَجَدَ سَجْدَتَيْنِ