صحيح البخاري Sahih Bukhari كتاب السهو The Book of As-Sahw (Forgetting)
بَابُ إِذَا صَلَّى خَمْسًا:

(2) Chapter. If one offers five Raka (instead of four).

1 hadith
Hadith 1226
حَدَّثَنَا أَبُو الْوَلِيدِ ، حَدَّثَنَا شُعْبَةُ ، عَنْ الْحَكَمِ ، عَنْ إِبْرَاهِيمَ ، عَنْ عَلْقَمَةَ ، عَنْ عَبْدِ اللَّهِ رَضِيَ اللَّهُ عَنْهُ ، " أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ صَلَّى الظُّهْرَ خَمْسًا , فَقِيلَ لَهُ : أَزِيدَ فِي الصَّلَاةِ ؟ فَقَالَ : وَمَا ذَاكَ ، قَالَ : صَلَّيْتَ خَمْسًا ، فَسَجَدَ سَجْدَتَيْنِ بَعْدَ مَا سَلَّمَ " .
Narrated' `Abdullah: Once Allah's Apostle offered five rak`at in the Zuhr prayer, and somebody asked him whether there was some increase in the prayer. Allah's Apostle said, "What is that?" He said, "You have offered five rak`at." So Allah's Apostle performed two prostrations of Sahu after Taslim.
Hadith Reference Sahih Bukhari / The Book of As-Sahw (Forgetting) / Hadith: 1226
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة