بُلُوغُ الْمَرَامِ
Bulugh al-Maram 330
The Book of Prayer
عَنْ عَبْدِ اَللَّهِ بْنِ بُحَيْنَةَ -رَضِيَ اَللَّهُ تَعَالَى عَنْهُ- { أَنَّ اَلنَّبِيَّ - صلى الله عليه وسلم -صَلَّى بِهِمُ الظُّهْرَ , فَقَامَ فِي اَلرَّكْعَتَيْنِ اَلْأُولَيَيْنِ , وَلَمْ يَجْلِسْ , فَقَامَ اَلنَّاسُ مَعَهُ , حَتَّى إِذَا قَضَى اَلصَّلَاةَ , وَانْتَظَرَ اَلنَّاسُ تَسْلِيمَهُ , كَبَّرَ وَهُوَ جَالِسٌ . وَسَجَدَ سَجْدَتَيْنِ , قَبْلَ أَنْ يُسَلِّمَ , ثُمَّ سَلَّمَ } أَخْرَجَهُ اَلسَّبْعَةُ , وَهَذَا لَفْظُ اَلْبُخَارِيِّ . [1]
Narrated 'Abdullah bin Buhainah (RA): The Prophet (ﷺ) led them in the Zuhr prayer, and when he stood up at the end of the first two Rak'at and did not sit, the people stood up with him. When he finished the Salat (prayer) and the people expected him to do the Taslim (salutation), he uttered the Takbir while sitting and made two prostrations before saying the Taslim (salutation), then he uttered the Taslim (salutation). [Reported by as-Sab'ah and this is al-Bukhari's wording].
Sunnah.com reference: Book 2, Hadith 225