Hadith 11468

(حديث مرفوع) حَدَّثَنَا حَسَنُ بْنُ مُوسَى ، حَدَّثَنَا شَيْبَانُ ، عَنْ يَحْيَى ، حَدَّثَنِي عِيَاضُ بْنُ هِلَالٍ الْأَنْصَارِيُّ ، قَالَ : سَمِعْتُ أَبَا سَعِيدٍ الْخُدْرِيَّ يَقُولُ : قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " إِذَا صَلَّى أَحَدُكُمْ فَنَسِيَ كَمْ صَلَّى ، أَوْ قَالَ فَلَمْ يَدْرِ زَادَ أَمْ نَقَصَ ، فَلْيَسْجُدْ سَجْدَتَيْنِ وَهُوَ جَالِسٌ ، وَإِذَا جَاءَ أَحَدَكُمْ الشَّيْطَانُ فَقَالَ : إِنَّكَ قَدْ أَحْدَثْتَ ، فَلْيَقُلْ : كَذَبْتَ إِلَّا مَا سَمِعَهُ بِأُذُنِهِ ، أَوْ وَجَدَ رِيحَهُ بِأَنْفِهِ " .
Iyad (may Allah have mercy on him) says that I asked Hazrat Abu Saeed Khudri (may Allah be pleased with him) that sometimes one of us is praying and he does not remember how many rak'ahs he has prayed? He replied that the Prophet (peace and blessings of Allah be upon him) said: When any one of you is praying and does not remember how many rak'ahs he has prayed, he should perform two prostrations of forgetfulness while sitting. And when Satan comes to any one of you and says that your ablution has broken, then say to him: "You are lying," unless he smells something with his nose or hears a sound with his ears.
Hadith Reference مسند احمد / مسند المكثرين من الصحابة / 11468
Hadith Grading حکم دارالسلام: حديث صحيح لغيره، وهذا إسناد ضعيف لجهالة عياض بن هلال الأنصاري