The Sufficient (Vol 4) · Hadith 1973 (#Ḥadīth #2)

2ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عُثْمَانَ بْنِ عِيسَى قَالَ سَأَلْتُ أَبَا الْحَسَنِ (عَلَيْهِ السَّلاَم) عَنْ إِتْمَامِ الصَّلاةِ وَالصِّيَامِ فِي الْحَرَمَيْنِ فَقَالَ أَتِمَّهَا وَلَوْ صَلاةً وَاحِدَةً.

2. A number of our people have narrated from Ahmad ibn Muhammad from ‘Uthman ibn ‘Isa who has said the following: “I once asked abu al-Hassan , about performing Salat (prayer) in complete form and fasting in the two al-Haram (the sacred places); Masjid al-Haram and Masjid of al-Madinah. He (the Imam) said, ‘You should perform Salat (prayer) in complete form, even if it is one Salat (prayer).”’

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).