The Sufficient (Vol 3) · Hadith 1379 (#Ḥadīth #3)
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
3ـ حَمَّادٌ عَنِ ابْنِ أَبِي يَعْفُورٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ قَالَ إِذَا شَكَكْتَ فَلَمْ تَدْرِ أَ فِي ثَلاَثٍ أَنْتَ أَمْ فِي اثْنَتَيْنِ أَمْ فِي وَاحِدَةٍ أَمْ فِي أَرْبَعٍ فَأَعِدْ وَلاَ تَمْضِ عَلَى الشَّكِّ.
3. Hammad has narrated from ibn abu Ya‘fur who has said the following: “Abu ‘Abd Allah , has said, ‘If you doubt and do not know if you have performed three or two or one or four, perform Salah (prayer) again and do not continue with doubt.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).