كتاب السهو
13  
The Book of Forgetfulness (In Prayer)
(26)
Chapter: What a person should do if he prays five (rak'ahs)
(26)
باب مَا يَفْعَلُ مَنْ صَلَّى خَمْسًا
Sunan an-Nasa'i 1258
It was narrated that Ibrahim said:
"Alqamah prayed five (rak'ahs) and when he said the taslim, Ibrahim bin Suwaid said : 'O Abu Shibl, you prayed five!' He said: 'Is that true, O odd-eyed one?' Then he prostrated two prostrations of forgetfulness, then he said: 'This is what the Messenger of Allah (ﷺ) did.'"
أَخْبَرَنَا سُوَيْدُ بْنُ نَصْرٍ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ سُفْيَانَ، عَنِ الْحَسَنِ بْنِ عُبَيْدِ اللَّهِ، عَنْ إِبْرَاهِيمَ، أَنَّ عَلْقَمَةَ، صَلَّى خَمْسًا فَلَمَّا سَلَّمَ قَالَ إِبْرَاهِيمُ بْنُ سُوَيْدٍ يَا أَبَا شِبْلٍ صَلَّيْتَ خَمْسًا ‏.‏ فَقَالَ أَكَذَلِكَ يَا أَعْوَرُ فَسَجَدَ سَجْدَتَىِ السَّهْوِ ثُمَّ قَالَ هَكَذَا فَعَلَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 1258
In-book reference : Book 13, Hadith 80
English translation : Vol. 2, Book 13, Hadith 1259