"The Prophet ﷺ prayed Zuhr with five rak'ahs, and it was said to him: 'Has something been added to the prayer?' He said: 'Why are you asking?' They said: 'You prayed five.' So he turned around and prostrated twice."  

صَلَّى النَّبِيُّ ﷺ الظُّهْرَ خَمْسًا فَقِيلَ لَهُ أَزِيدَ فِي الصَّلاَةِ قَالَ وَمَا ذَاكَ قَالُوا صَلَّيْتَ خَمْسًا فَثَنَى رِجْلَهُ وَسَجَدَ سَجْدَتَيْنِ  

The Prophet ﷺ led them in praying Zuhr with five (rak'ahs). They said: 'You prayed five.' So he prostrated twice after he had said the taslim, while he was sitting.  

عَنِ النَّبِيِّ ﷺ أَنَّهُ صَلَّى بِهِمُ الظُّهْرَ خَمْسًا فَقَالُوا إِنَّكَ صَلَّيْتَ خَمْسًا فَسَجَدَ سَجْدَتَيْنِ بَعْدَ مَا سَلَّمَ وَهُوَ جَالِسٌ  

"Alqamah prayed five (rak'ahs) and was told about that. He said: 'Did I really do that?' I nodded yes. He said: 'What about you, O odd-eyed one?' I said: 'Yes'. So he prostrated twice, then he narrated to us from 'Abdullah that the Prophet ﷺ prayed five (rak'ahs), and the people whispered to one another, then they said to him: 'Has something been added the prayer?' He said: 'No.' So they told him, and he turned around and prostrated twice, then he said: 'I am only human; I forget as you forget.'"  

مَا فَعَلْتُ قُلْتُ بِرَأْسِي بَلَى قَالَ وَأَنْتَ يَا أَعْوَرُ فَقُلْتُ نَعَمْ فَسَجَدَ سَجْدَتَيْنِ ثُمَّ حَدَّثَنَا عَنْ عَبْدِ اللَّهِ عَنِ النَّبِيِّ ﷺ أَنَّهُ صَلَّى خَمْسًا فَوَشْوَشَ الْقَوْمُ بَعْضُهُمْ إِلَى بَعْضٍ فَقَالُوا لَهُ أَزِيدَ فِي الصَّلاَةِ قَالَ لاَ فَأَخْبَرُوهُ فَثَنَى رِجْلَهُ فَسَجَدَ سَجْدَتَيْنِ ثُمَّ قَالَ إِنَّمَا أَنَا بَشَرٌ أَنْسَى كَمَا تَنْسَوْنَ  

"I heard Ash-Sha'bi say: 'Alqamah bin Qais forgot (and made a mistake) in his prayer, and they told him about that after he had spoken, He said: 'Is that true, O odd-eyed one?' He said: 'Yes.' So he undid his cloak, then he performed two prostrations of forgtfulness,and said: 'This is what the Messenger of Allah ﷺ did.' He said: And I heard Al-Hakam say: 'Alqamah had prayed five.'"  

نَعَمْ فَحَلَّ حُبْوَتَهُ ثُمَّ سَجَدَ سَجْدَتَىِ السَّهْوِ وَقَالَ هَكَذَا فَعَلَ رَسُولُ اللَّهِ ﷺ قَالَ وَسَمِعْتُ الْحَكَمَ يَقُولُ كَانَ عَلْقَمَةُ صَلَّى خَمْسًا 33  

"Alqamah prayed five (rak'ahs) and when he said the taslim, Ibrahim bin Suwaid said : 'O Abu Shibl, you prayed five!' He said: 'Is that true, O odd-eyed one?' Then he prostrated two prostrations of forgetfulness, then he said: 'This is what the Messenger of Allah ﷺ did.'"  

أَكَذَلِكَ يَا أَعْوَرُ فَسَجَدَ سَجْدَتَىِ السَّهْوِ ثُمَّ قَالَ هَكَذَا فَعَلَ رَسُولُ اللَّهِ ﷺ  

The Messenger of Allah ﷺ offered one of the afternoon prayers with five (rak'ahs), and it was said to him: "Has something been added to the prayer?" He said: 'Why are you asking?' They said: 'You prayed five.' He said: 'I am only human, I forget as you forget, and I remember as you remember.' Then he prostrated twice then ended his prayer.  

أَنَّ رَسُولَ اللَّهِ ﷺ صَلَّى إِحْدَى صَلاَتَىِ الْعَشِيِّ خَمْسًا فَقِيلَ لَهُ أَزِيدَ فِي الصَّلاَةِ فَقَالَ وَمَا ذَاكَ قَالُوا صَلَّيْتَ خَمْسًا قَالَ إِنَّمَا أَنَا بَشَرٌ أَنْسَى كَمَا تَنْسَوْنَ وَأَذْكُرُ كَمَا تَذْكُرُونَ فَسَجَدَ سَجْدَتَيْنِ ثُمَّ انْفَتَلَ