‘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  

[Machine] That the Prophet ﷺ missed two units of the evening prayer (Isha') and then a person with two hands came to him and said, "Did you shorten the prayer or forget?" He replied, "None of that happened." Then he turned to the people and asked, "What did the person with two hands say?" They replied, "Yes." So he completed the remaining prayer and then he performed the prostrations of forgetfulness.  

أَنَّ النَّبِيَّ ﷺ سَلَّمَ مِنَ اثْنَتَيْنِ مِنْ صَلَاةِ الْعَشِيِّ فَقَامَ إِلَيْهِ ذُو الْيَدَيْنِ فَقَالَ أَقُصِرَتِ الصَّلَاةُ أَمْ نَسِيتَ؟ فَقَالَ «كُلُّ ذَلِكَ لَمْ يَكُنْ» ثُمَّ أَقْبَلَ عَلَى النَّاسِ فَقَالَ «أَكَمَا يَقُولُ ذُو الْيَدَيْنِ؟ » قَالُوا نَعَمْ فَأَتَمَّ مَا بَقِيَ مِنَ الصَّلَاةِ ثُمَّ سَلَّمَ ثُمَّ سَجَدَ سَجْدَتَيِ السَّهْوِ