The Sufficient (Vol 4) · Hadith 1984 (#Ḥadīth #5)
Chapter 201 | Excellence of Performing Salat (Prayer) in Masjid al-Haram (the Sacred Masjid) and the Best Place Therein
5ـ أَحْمَدُ بْنُ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ أَبِي سَلَمَةَ عَنْ هَارُونَ بْنِ خَارِجَةَ عَنْ صَامِتٍ عَنْ أَبِي عَبْدِ الله عَنْ آبَائِهِ (عَلَيْهِم السَّلاَم) قَالَ الصَّلاةُ فِي الْمَسْجِدِ الْحَرَامِ تَعْدِلُ مِائَةَ أَلْفِ صَلاةٍ.
5. Ahmad ibn Muhammad has narrated from Ali ibn abu Salmah from Flarun ibn Kharijah from Samet who has said the following: “Abu ‘Abd Allah , has narrated from his ancestors, ‘Alayhim al-Salam, who have said that performing Salat (prayer) in Masjid al-Haram is equal to one hundred thousand Salat (prayer) elsewhere.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).