Man Lā Yaḥḍuruh al-Faqīh
Hadith 993995 - وَ أَمَّا حَدِيثُ صَفْوَانَ بْنِ مِهْرَانَ اَلْجَمَّالِ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: وَ سَأَلْتُهُ عَنْ سَجْدَتَيِ اَلسَّهْوِ فَقَالَ «إِذَا نَقَصْتَ فَقَبْلَ اَلتَّسْلِيمِ وَ إِذَا زِدْتَ فَبَعْدَهُ.
Hadith.995 - As for the narration of Safwan ibn Mehran al-Jammal from Imam Jafar ibn Muhammad Al-Sadiq (as) that He said:
"I asked him about the two prostrations of forgetfulness (Sajdat al-Sahw),
Imam (as) said: 'If you have made a mistake by reducing something in your prayer, then [perform the prostrations] before the Tasleem. But if you have added something, then [perform the prostrations] after the Tasleem.'"