٢٢ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنْ عَبْدِ الله بْنِ الْمُغِيرَةِ عَنِ ابْنِ مُسْكَانَ عَنِ الْحَسَنِ الصَّيْقَلِ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ قُلْتُ لَهُ الرَّجُلُ يُصَلِّي الرَّكْعَتَيْنِ مِنَ الْوَتْرِ ثُمَّ يَقُومُ فَيَنْسَى التَّشَهُّدَ حَتَّى يَرْكَعَ وَيَذْكُرُ وَهُوَ رَاكِعٌ قَالَ يَجْلِسُ مِنْ رُكُوعِهِ فَيَتَشَهَّدُ ثُمَّ يَقُومُ فَيُتِمُّ قَالَ قُلْتُ أَ لَيْسَ قُلْتَ فِي الْفَرِيضَةِ إِذَا ذَكَرَهُ بَعْدَ مَا رَكَعَ مَضَى ثُمَّ سَجَدَ سَجْدَتَيِ السَّهْوِ بَعْدَ مَا يَنْصَرِفُ وَيَتَشَهَّدُ فِيهِمَا قَالَ لَيْسَ النَّافِلَةُ مِثْلَ الْفَرِيضَةِ.
22. Ali ibn Ibrahim has narrated from his father from ‘Abd Allah ibn al-Mughirah from ibn Muskan from al-Hassan al-Sayqal who has said the following: “I once said to abu ‘Abd Allah , about a man who performs two Rak‘at of al-Witr, then stands up and forgets saying Tashahhud (testimonies of belief) until he performs Ruku‘ (bowing down on one’s knees), then remembers when he is in Ruku‘. He (the Imam) said, ‘He is required to sit down from Ruku‘, say Tashahhud, then stand up and complete.’ He (the narrator) has said that he asked, ‘Have you not said that in obligatory Salah (prayer) if one remembers after Ruku‘, one continues, then performs two Sajdah (prostration) because of mistake after ending Salah (prayer) in which one says Tashahhud (testimonies of belief)?’ He (the Imam) said, ‘Optional Salah (prayer) is not like obligatory one.’” 