The Sufficient (Vol 3) · Hadith 1377 (#Ḥadīth #1)
Chapter 43 | Facing Doubts about Salah (Prayer) As a Whole, Not Knowing if It Is Increased or Decreased, One Facing Mistakes Very Often, Mistakes in Optional Salah (prayer) and Mistakes of an Imam and Those behind Him
1ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنْ مُحَمَّدِ بْنِ خَالِدٍ عَنْ سَعْدِ بْنِ سَعْدٍ عَنْ صَفْوَانَ عَنْ أَبِي الْحَسَنِ (عَلَيْهِ الْسَّلام) قَالَ إِنْ كُنْتَ لاَ تَدْرِي كَمْ صَلَّيْتَ وَلَمْ يَقَعْ وَهْمُكَ عَلَى شَيْءٍ فَأَعِدِ الصَّلاَةَ.
1. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from Muhammad ibn Khalid from Sa‘d ibn Sa‘d from Safwan who has said the following: “Abu al-Hassan , has said, ‘If you do not know how many Rak‘at you have performed and your guess does not settle anywhere, perform your Salah (prayer) again.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).