Arabic (Original)
أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ ثنا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ يَعْقُوبَ ثنا الْحَسَنُ بْنُ عَلِيِّ بْنِ عَفَّانَ ثنا ابْنُ نُمَيْرٍ عَنِ الْأَعْمَشِ عَنْ سَالِمٍ يَعْنِي ابْنَ أَبِي الْجَعْدِ عَنْ ثَوْبَانَ قَالَ قَالَ رَسُولُ اللهِ ﷺ اسْتَقِيمُوا وَلَنْ تُحْصُوا وَاعْلَمُوا أَنَّ خَيْرَ أَعْمَالِكُمُ الصَّلَاةُ وَلَنْ يُحَافِظَ عَلَى الْوُضُوءِ إِلَّا مُؤْمِنٌ
English Translation
Abu Sa'id al-Khudri narrated that the Prophet (peace be upon him) said: "When one of you doubts in his prayer and does not know whether he prayed three or four, let him cast away the doubt and build upon what he is certain of. Then let him perform two prostrations before the taslim."