Sahih al-Bukhari 404
Book 8: Prayers (Salat) · Narrated by `Abdullah
Arabic
حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ شُعْبَةَ، عَنِ الْحَكَمِ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ، قَالَ صَلَّى النَّبِيُّ صلى الله عليه وسلم الظُّهْرَ خَمْسًا فَقَالُوا أَزِيدَ فِي الصَّلاَةِ قَالَ " وَمَا ذَاكَ ". قَالُوا صَلَّيْتَ خَمْسًا. فَثَنَى رِجْلَيْهِ وَسَجَدَ سَجْدَتَيْنِ.
English translation
Narrated `Abdullah:"Once the Prophet (ﷺ) offered five rak`at in Zuhr prayer. He was asked, "Is there an increase in the prayer?" The Prophet (ﷺ) said, "And what is it?" They said, "You have prayed five rak`at.' So he bent his legs and performed two prostrations (of Sahu)
Reference: Sahih al-Bukhari 404, Book of Prayers (Salat). English translation by Dr. Muhammad Muhsin Khan.