4ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ مُحَمَّدِ بْنِ الْحُسَيْنِ وَمُحَمَّدُ بْنُ إِسْمَاعِيلَ عَنِ الْفَضْلِ بْنِ شَاذَانَ جَمِيعاً عَنْ صَفْوَانَ بْنِ يَحْيَى عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْحَجَّاجِ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلام) عَنِ الرَّجُلِ يَتَكَلَّمُ نَاسِياً فِي الصَّلاَةِ يَقُولُ أَقِيمُوا صُفُوفَكُمْ فَقَالَ يُتِمُّ صَلاَتَهُ ثُمَّ يَسْجُدُ سَجْدَتَيْنِ فَقُلْتُ سَجْدَتَا السَّهْوِ قَبْلَ التَّسْلِيمِ هُمَا أَوْ بَعْدُ قَالَ بَعْدُ.
4. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn Ahmad ibn Muhammad from Muhammad ibn ’Isma‘il from al- Fadl ibn Shadhan all from Safwan ibn Yahya from ‘Abd al-Rahman ibn al-Hajjaj who has said the following: “I once asked abu ‘Abd Allah (a.s.), about a man who speaks because of forgetfulness in Salah (prayer) saying, ‘Straighten your rows? He (the Imam) said, ‘He completes his Salah (prayer), then performs two Sajdah (prostration)? I then asked, ‘Are the two Sajdah (prostration) because of mistake after or before Salam (the phrase of offering greeting of peace)?’ He (the Imam) said, ‘It is afterward?”