حَدَّثَنَا جَرِيرٌ عَنْ مَنْصُورٍ عَنْ إِبْرَاهِيمَ عَنْ عَلْقَمَةَ عَنْ عَبْدِ اللَّهِ قَالَ صَلَّى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ صَلَاةً فَلَا أَدْرِي زَادَ أَمْ نَقَصَ فَلَمَّا سَلَّمَ قِيلَ لَهُ يَا رَسُولَ اللَّهِ هَلْ حَدَثَ فِي الصَّلَاةِ شَيْءٌ قَالَ لَا وَمَا ذَاكَ قَالُوا صَلَّيْتَ كَذَا وَكَذَا قَالَ فَثَنَى رِجْلَيْهِ فَسَجَدَ سَجْدَتَيْ السَّهْوِ فَلَمَّا سَلَّمَ قَالَ إِنَّمَا أَنَا بَشَرٌ أَنْسَى كَمَا تَنْسَوْنَ وَإِذَا شَكَّ أَحَدُكُمْ فِي الصَّلَاةِ فَلْيَتَحَرَّ الصَّلَاةَ فَإِذَا سَلَّمَ فَلْيَسْجُدْ سَجْدَتَيْنِ
مسند امام احمد بن حنبل · Hadith 3602
It was narrated that 'Abdullah (RA) said: The Messenger of Allah (PBUH) prayed and I do not know whether he added or omitted something. When he said the salam, it was said to him: O Messenger of Allah, has something new been introduced into the prayer? He said: "No. Why are you asking?" They said: You did such and such in the prayer. He turned to face the qiblah, then he prostrated twice and said the tasleem, then he said: "I am human, I forget as you forget. If one of you is unsure in his prayer, let him try to work out what is correct and proceed on that basis, then prostrate twice."
Sanad
حَدَّثَنَا جَرِيرٌ عَنْ مَنْصُورٍ عَنْ إِبْرَاهِيمَ عَنْ عَلْقَمَةَ عَنْ عَبْدِ اللَّهِ