The Messenger of Allah ﷺ prayed Zuhr with two rak'ahs, then said the salam. They said: "Has the prayer been shortened?" So he stood up and prayed two rak'ahs, then he said the salam, then he prostrated twice.  

أَنَّ رَسُولَ اللَّهِ ﷺ صَلَّى صَلاَةَ الظُّهْرِ رَكْعَتَيْنِ ثُمَّ سَلَّمَ فَقَالُوا أَقُصِرَتِ الصَّلاَةُ فَقَامَ وَصَلَّى رَكْعَتَيْنِ ثُمَّ سَلَّمَ ثُمَّ سَجَدَ سَجْدَتَيْنِ  

Abu Hurairah reported; The Prophet ﷺ offered the noon prayer and he gave the salutation at the end of two rakahs. He was asked. Has the prayer been shortened ? then he offered two rakahs of the prayer and made two prostrations (at the end of it).  

أَنَّ النَّبِيَّ ﷺ صَلَّى الظُّهْرَ فَسَلَّمَ فِي الرَّكْعَتَيْنِ فَقِيلَ لَهُ نَقَصَتِ الصَّلاَةُ فَصَلَّى رَكْعَتَيْنِ ثُمَّ سَجَدَ سَجْدَتَيْنِ  

‘O Messenger of Allah, has the prayer been shortened or did you forget?’ He said: ‘It has not been shortened and I did not forget.’ He said: ‘But you prayed two Rak’ah.’ He said: ‘Is what Dhul-Yadain says true?’ They said: ‘Yes.’ So he went forward and performed two Rak’ah and said the Salam, then he prostrated twice for prostrations of forgetfulness.  

أَنَّ رَسُولَ اللَّهِ ﷺ سَهَا فَسَلَّمَ فِي الرَّكْعَتَيْنِ فَقَالَ لَهُ رَجُلٌ يُقَالُ لَهُ ذُو الْيَدَيْنِ يَا رَسُولَ اللَّهِ أَقَصُرَتِ الصَّلاَةُ أَمْ نَسِيتَ؟ قَالَ مَا قَصُرَتْ وَمَا نَسِيتُ قَالَ إِنَّكَ صَلَّيْتَ رَكْعَتَيْنِ قَالَ أَكَمَا يَقُولُ ذُو الْيَدَيْنِ؟ قَالُوا نَعَمْ فَتَقَدَّمَ فَصَلَّى رَكْعَتَيْنِ ثُمَّ سَلَّمَ ثُمَّ سَجَدَ سَجْدَتَىِ السَّهْوِ  

The Messenger of Allah ﷺ prayed Zuhr with two rak'ahs, then said the salam. They said: "Has the prayer been shortened?" So he stood up and prayed two rak'ahs, then he said the salam, then he prostrated twice. (Using translation from Nasāʾī 1227)   

أَنَّ رَسُولَ اللهِ ﷺ صَلَّى الظُّهْرَ رَكْعَتَيْنِ ثُمَّ سَلَّمَ قَالُوا قَصُرَتِ الصَّلَاةُ؟ قَالَ فَقَامَ فَصَلَّى رَكْعَتَيْنِ ثُمَّ سَلَّمَ ثُمَّ سَجَدَ سَجْدَتَيْنِ بَعْدَ مَا سَلَّمَ  

The Messenger of Allah ﷺ prayed Zuhr with two rak'ahs, then said the salam. They said: "Has the prayer been shortened?" So he stood up and prayed two rak'ahs, then he said the salam, then he prostrated twice. (Using translation from Nasāʾī 1227)   

أَنَّ رَسُولَ اللهِ ﷺ صَلَّى الظُّهْرَ رَكْعَتَيْنِ ثُمَّ سَلَّمَ فَقِيلَ لَهُ نَقَصَ مِنَ الصَّلَاةِ؟ فَصَلَّى رَكْعَتَيْنِ أُخَرَتَيْنِ ثُمَّ سَلَّمَ ثُمَّ سَجَدَ سَجْدَتَيْنِ  

The Messenger of Allah ﷺ prayed Zuhr with two rak'ahs, then said the salam. They said: "Has the prayer been shortened?" So he stood up and prayed two rak'ahs, then he said the salam, then he prostrated twice. (Using translation from Nasāʾī 1227)  

أَنَّ رَسُولَ اللهِ ﷺ صَلَّى الظُّهْرَ رَكْعَتَيْنِ ثُمَّ سَلَّمَ فَقَالُوا أَقَصُرَتِ الصَّلَاةُ فَقَامَ «فَصَلَّى رَكْعَتَيْنِ ثُمَّ سَلَّمَ ثُمَّ سَجَدَ سَجْدَتَيْنِ»  

"أَنَّ النَّبِىَّ ﷺ صَلَّى الظُهْرَ رَكْعَتَيْن ثُمَ سَلَّمَ، فَقِيلَ لَهُ: انْقُصْ من الصَّلَاةِ، فَصَلَّى رَكعَتين أُخَراوَيْن فَسَلَّم، ثُمَ سَجَد سَجْدَتَيْن".