مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 1018
Prayer
Forgetfulness - Section 1
وَعَن عبد لله بن بُحَيْنَة: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ صَلَّى بِهِمُ الظُّهْرَ فَقَامَ فِي الرَّكْعَتَيْنِ الْأُولَيَيْنِ لَمْ يَجْلِسْ فَقَامَ النَّاسُ مَعَهُ حَتَّى إِذَا قَضَى الصَّلَاةَ وَانْتَظَرَ النَّاسُ تَسْلِيمَهُ كَبَّرَ وَهُوَ جَالِسٌ فَسَجَدَ سَجْدَتَيْنِ قَبْلَ أَنْ يُسَلِّمَ ثُمَّ سَلَّمَ
‘Abdallah ibn Buhaina said that the Prophet (ﷺ) led them in the noon prayer, and when he stood up at the end of the first two rak'as and did not sit, the people stood up along with him. When he finished the prayer and the people expected him to give the salutation, he said “God is most great" while sitting and made two prostrations before giving the salutation. Then he gave it. (Bukhari and Muslim.)
Mishkat al-Masabih, 1018مُتَّفق عَلَيْهِ (الألباني)