Once Messenger of Allah ﷺ led us in the Zuhr prayer and got up (after the prostrations of the second rakʿa) although he should have sat (for the Tashahhud). So at the end of the prayer, he prostrated twice while sitting (prostrations of Sahu).  

صَلَّى بِنَا رَسُولُ اللَّهِ ﷺ الظُّهْرَ فَقَامَ وَعَلَيْهِ جُلُوسٌ فَلَمَّا كَانَ فِي آخِرِ صَلاَتِهِ سَجَدَ سَجْدَتَيْنِ وَهْوَ جَالِسٌ