صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جماع أبواب السهو فى الصلاةChapters on Forgetfulness in Prayer
(425) بَابُ ذِكْرِ الْخَبَرِ الْمُتَقَصَّى فِي الْمُصَلِّي شَكَّ فِي صَلَاتِهِ وَالْأَمْرِ بِالْبِنَاءِ عَلَى الْأَقَلِّ مِمَّا يَشُكُّ فِيهِ الْمُصَلِّي،The chapter on the detailed report about a person doubting his prayer and the command to build on the lesser number
Hadith 1023
نَا مُحَمَّدُ بْنُ الْعَلاءِ بْنِ كُرَيْبٍ ، وَعَبْدُ اللَّهِ بْنِ سَعِيدٍ الأَشَجُّ ، قَالا : حَدَّثَنَا أَبُو خَالِدٍ ، عَنِ ابْنِ عَجْلانَ ، عَنْ زَيْدِ بْنِ أَسْلَمَ ، عَنْ عَطَاءِ بْنِ يَسَارٍ ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ ، قَالَ : قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " إِذَا شَكَّ أَحَدُكُمْ فِي صَلاتِهِ فَلْيُلْغِ الشَّكَّ وَلْيَبْنِ عَلَى الْيَقِينِ ، فَإِنِ اسْتَيْقَنَ التَّمَامَ سَجَدَ سَجْدَتَيْنِ ، فَإِنْ كَانَتْ صَلاتُهُ تَامَّةً كَانَتِ الرَّكْعَةُ نَافِلَةً وَالسَّجْدَتَانِ ، وَإِنْ كَانَتْ نَاقِصَةً كَانَتِ الرَّكْعَةُ تَمَامًا لِصَلاتِهِ وَالسَّجْدَتَانِ تُرْغِمَانِ أَنْفَ الشَّيْطَانِ "
Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said: "When any of you has doubt in his prayer, he should leave the doubt and act upon what is certain. Then, if he becomes certain that his prayer is complete, he should perform two (prostrations of forgetfulness) sajdahs. If his prayer was complete, then that rak'ah and the two sajdahs will be counted as voluntary (nafl) acts, and if the prayer was not complete, then this rak'ah will complete his prayer and the two sajdahs will be a means of humiliating and disgracing Satan."
