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. (Using translation from Muslim 570a)   

صَلَّى بِنَا رَسُولُ اللهِ ﷺ رَكْعَتَيْنِ مِنْ بَعْضِ الصَّلَوَاتِ ثُمَّ قَامَ وَلَمْ يَجْلِسْ فَقَامَ النَّاسُ مَعَهُ فَلَمَّا قَضَى صَلَاتَهُ وَنَظَرْنَا تَسْلِيمَهُ كَبَّرَ فَسَجَدَ سَجْدَتَيْنِ وَهُوَ جَالِسٌ قَبْلَ التَّسْلِيمِ ثُمَّ سَلَّمَ  

[Machine] The Messenger of Allah ﷺ performed one of my evening prayers, and he stood up for the two units of prayer without sitting. When he was in his last prayer, we waited for his tasleem - that is, for him to say the tasleem - and he prostrated twice before saying the tasleem, then he said the tasleem.  

صَلَّى رَسُولُ اللهِ ﷺ إِحْدَى صَلَاتِي الْعِشَاءِ فَقَامَ فِي الرَّكْعَتَيْنِ فَلَمْ يَجْلِسْ فَلَمَّا كَانَ فِي آخِرِ صَلَاتِهِ انْتَظَرْنَا تَسْلِيمَهُ أَيْ أَنْ يُسَلِّمَ فَسَجَدَ سَجْدَتَيْنِ قَبْلَ أَنْ يُسَلِّمَ ثُمَّ سَلَّمَ  

[Machine] This is how I saw the Messenger of Allah ﷺ do. My father said, and this is also my opinion, the sheikh said, and so did 'Uqbah ibn 'Amir al-Juhani do. Abu Dawud al-Sijistani said, and so did Ibn al-Zubair prostrate and stand from two before the salaam, and this is the statement of al-Zuhri. The sheikh said, there is a difference of opinion on this from Abdullah ibn al-Zubair.  

هَكَذَا رَأَيْتُ رَسُولَ اللهِ ﷺ صَنَعَ قَالَ أَبِي وَهُوَ رَأْيِي قَالَ الشَّيْخُ وَكَذَلِكَ فَعَلَهُ عُقْبَةُ بْنُ عَامِرٍ الْجُهَنِيُّ قَالَ أَبُو دَاوُدَ السِّجِسْتَانِيُّ وَكَذَلِكَ سَجَدَهُمَا ابْنُ الزُّبَيْرِ وَقَامَ مِنْ ثِنْتَيْنِ قَبْلَ التَّسْلِيمِ وَهُوَ قَوْلُ الزُّهْرِيِّ قَالَ الشَّيْخُ قَدِ اخْتُلِفَ فِيهِ عَنْ عَبْدِ اللهِ بْنِ الزُّبَيْرِ