Sahih al-Bukhari 1224
Narrated `Abdullah bin Buhaina:
Allah's Messenger (ﷺ) once led us in a prayer and offered two rak`at and got up (for the third rak`a) without 
sitting (after the second rak`a). The people also got up with him, and when he was about to finish his 
prayer, we waited for him to finish the prayer with Taslim but he said Takbir before Taslim and 
performed two prostrations while sitting and then finished the prayer with Taslim.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكُ بْنُ أَنَسٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عَبْدِ الرَّحْمَنِ الأَعْرَجِ، عَنْ عَبْدِ اللَّهِ ابْنِ بُحَيْنَةَ ـ رضى الله عنه ـ أَنَّهُ قَالَ صَلَّى لَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم رَكْعَتَيْنِ مِنْ بَعْضِ الصَّلَوَاتِ ثُمَّ قَامَ فَلَمْ يَجْلِسْ، فَقَامَ النَّاسُ مَعَهُ، فَلَمَّا قَضَى صَلاَتَهُ وَنَظَرْنَا تَسْلِيمَهُ كَبَّرَ قَبْلَ التَّسْلِيمِ فَسَجَدَ سَجْدَتَيْنِ وَهُوَ جَالِسٌ ثُمَّ سَلَّمَ‏.‏