Sahih Muslim 552
صحيح مسلم#552Sahihحَدَّثَنِي أَبُو الطَّاهِرِ، وَهَارُونُ بْنُ سَعِيدٍ الأَيْلِيُّ، قَالاَ أَخْبَرَنَا ابْنُ وَهْبٍ، عَنْ أَبِي صَخْرٍ، أَنَّ عُمَرَ بْنَ إِسْحَاقَ، مَوْلَى زَائِدَةَ حَدَّثَهُ عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَقُولُ " الصَّلَوَاتُ الْخَمْسُ وَالْجُمُعَةُ إِلَى الْجُمُعَةِ وَرَمَضَانُ إِلَى رَمَضَانَ مُكَفِّرَاتٌ مَا بَيْنَهُنَّ إِذَا اجْتَنَبَ الْكَبَائِرَ " .
Abu Huraira reported:Verily the Messenger of Allah (ﷺ) said: The five (daily) prayers and from one Friday prayer to the (next) Friday prayer, and from Ramadhan to Ramadhan are expiations for the (sins) committed in between (their intervals) provided one shuns the major sins
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 2:19