The Rules of Forgetfulness (Sahw) in Prayer
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 50
وَقَالَ اَلرِّضَا عَلَيْهِ اَلسَّلاَمُ: «إِذَا كَثُرَ عَلَيْكَ اَلسَّهْوُ فِي اَلصَّلاَةِ فَامْضِ عَلَى صَلاَتِكَ وَ لاَ تُعِدْ.
Imam al-Ridha عليه السلام said: "If you experience frequent distraction (waswasah) during your prayer, continue with your prayer and do not repeat it."
- Ṣaḥīḥ al-Faqīh