٦ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ بَعْضِ أَصْحَابِهِ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) فِي رَجُلٍ صَلَّى فَلَمْ يَدْرِ أَ ثِنْتَيْنِ صَلَّى أَمْ ثَلاَثاً أَمْ أَرْبَعاً قَالَ يَقُومُ فَيُصَلِّي رَكْعَتَيْنِ مِنْ قِيَامٍ وَيُسَلِّمُ ثُمَّ يُصَلِّي رَكْعَتَيْنِ مِنْ جُلُوسٍ وَيُسَلِّمُ فَإِنْ كَانَتْ أَرْبَعَ رَكَعَاتٍ كَانَتِ الرَّكْعَتَانِ نَافِلَةً وَإِلاَّ تَمَّتِ الأرْبَعُ.
6. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from certain persons of his people who has said the following: “Abu ‘Abdullah , about the case of one who performs Salah (prayer) and doubts if he has performed two or four Rak’ah, has said, ‘ He stands up and performs two Rak’ah in a standing position. He then says the phrase of offering greeting of peace, then performs two Rak’ah in a sitting position, and says the phrase of offering greeting of peace. If, in fact, they were four Rak’ah the two Rak’ah become optional; otherwise, they complete the four Rak’ah.’” 