Description of the Prayer from Its Beginning to Its End
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 46
فَإِنَّهُ رُوِيَ عَنِ اَلصَّادِقِ عَلَيْهِ اَلسَّلاَمُ أَنَّهُ قَالَ: «مَنْ سَبَّحَ تَسْبِيحَ فَاطِمَةَ اَلزَّهْرَاءِ عَلَيْهَا اَلسَّلاَمُ فِي دُبُرِ اَلْفَرِيضَةِ قَبْلَ أَنْ يَثْنِيَ رِجْلَيْهِ غَفَرَ اَللَّهُ لَهُ.
It is narrated from Imam Jafar ibn Muhammad Al-Sadiq عليه السلام that He said: "Whoever recites the Tasbih of Sayyida Fatimah Al-Zahra صلى الله عليه وعلى آله وسلم after the obligatory prayer before moving their legs (changing their position) will have their sins forgiven by Allah سبحانه وتعالى."
- Ṣaḥīḥ al-Faqīh