The Sufficient (Vol 3) · Hadith 1008 (#Ḥadīth #4)
Chapter 3 | Salah (Prayer) Is Made Obligatory (Chapters 3-15, practical rules about prayer are best expressed in the form of fatwa.)
4ـ حَمَّادٌ عَنْ حَرِيزٍ عَنْ زُرَارَةَ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ الْسَّلام) فِي قَوْلِ الله عَزَّ وَجَلَّ إِنَّ الصَّلاةَ كانَتْ عَلَى الْمُؤْمِنِينَ كِتاباً مَوْقُوتاً أَيْ مَوْجُوباً.
4. Hammad has narrated from Hariz from Zurarah from who has said the following: “About the words of Allah, most Majestic, most Glorious, ‘Salah (prayer) in Mawqut (with certain timing) form was written on believers’ abu Ja‘far , has said, ‘it means obligatory.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).