حَدَّثَنَا عَمْرُو بْنُ رَافِعٍ حَدَّثَنَا إِسْمَعِيلُ ابْنُ عُلَيَّةَ عَنْ هِشَامٍ حَدَّثَنِي يَحْيَی حَدَّثَنِي عِيَاضٌ أَنَّهُ سَأَلَ أَبَا سَعِيدٍ الْخُدْرِيَّ فَقَالَ أَحَدُنَا يُصَلِّي فَلَا يَدْرِي کَمْ صَلَّی فَقَالَ قَالَ رَسُولُ اللَّهِ صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا صَلَّی أَحَدُکُمْ فَلَمْ يَدْرِ کَمْ صَلَّی فَلْيَسْجُدْ سَجْدَتَيْنِ وَهُوَ جَالِسٌ
ابن ماجہ · Hadith 1204
Iyad narrated that he asked Abu Sa'eed Al-Khudri: "One of us prays and he does not know how many (Rak'ah) he has prayed." He said: "The Messenger of Allah SAW said: 'When anyone of you prays and does not know how many he has prayed, let him perform two prostrations while he is sitting.''(Hasan).
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020