[Machine] I performed prayer behind the Prophet ﷺ , and he did not complete the takbir. And this, according to us, is considered to be a mistake that he inadvertently made, so he did not prostrate for it.  

صَلَّيْتُ خَلْفَ النَّبِيِّ ﷺ فَكَانَ لَا يُتِمُّ التَّكْبِيرَ وَهَذَا عِنْدَنَا مَحْمُولٌ عَلَى أَنَّهُ ﷺ سَهَا عَنْهُ فَلَمْ يَسْجُدْ لَهُ