Sunan an-Nasa'i 2173
سنن النسائي#2173Sahihأَخْبَرَنِي عِمْرَانُ بْنُ يَزِيدَ بْنِ خَالِدٍ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ شُعَيْبٍ، قَالَ أَنْبَأَنَا الأَوْزَاعِيُّ، عَنْ يَحْيَى، قَالَ حَدَّثَنِي أَبُو سَلَمَةَ، قَالَ أَخْبَرَنِي أَبُو هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ يَتَقَدَّمَنَّ أَحَدٌ الشَّهْرَ بِيَوْمٍ وَلاَ يَوْمَيْنِ إِلاَّ أَحَدٌ كَانَ يَصُومُ صِيَامًا قَبْلَهُ فَلْيَصُمْهُ " .
Abu Hurairah narrated that the Messengre of Allah said:"None should fast one or two days ahead of the month except, someone who had a prior habit for fasting, in which case let him fast
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:
In-book reference: 22:84