Sahih
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، وَأَبُو بَكْرِ بْنُ خَلاَّدٍ قَالاَ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ شُعْبَةَ، حَدَّثَنِي الْحَكَمُ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ، قَالَ: صَلَّى النَّبِيُّ ـ صلى الله عليه وسلم ـ الظُّهْرَ خَمْسًا. فَقِيلَ لَهُ: أَزِيدَ فِي الصَّلاَةِ؟ قَالَ " وَمَا ذَاكَ؟ " . فَقِيلَ لَهُ . فَثَنَى رِجْلَهُ، فَسَجَدَ سَجْدَتَيْنِ .
It was narrated that ‘Abdullah said:“(Once) the Prophet (ﷺ) prayed Zuhr with five Rak’ah, and it was said to him: ‘Has something been added to the prayer?’ He said: ‘What is that?’ They told him, and he turned back towards the Qiblah and performed two prostrations.”