The reciter: Yahya ibn Yahya narrated to us, saying: I read to Malik from Ibn Shihab from Abd al-Rahman al-A'raj from Abdullah ibn Buhaynah, who said:
The Messenger of Allah (ﷺ) led us two rak'ahs of prayer in one of the (obligatory) prayers and then got up and did not sit. and the people stood up along with him. When he finished the prayer and we expected him to pronounce salutation. he said:" Allah is Most Great" while sitting and made two prostrations before salutation and then pronounced (the, final) salutation.
صلى لنا رسول الله صلى الله عليه وسلم ركعتين من بعض الصلوات ثم قام فلم يجلس فقام الناس معه فلما قضى صلاته ونظرنا تسليمه كبر فسجد سجدتين وهو جالس قبل التسليم ثم سلم Sahih Muslim 570a.