Sunan an-Nasa'i 2419

سنن النسائي#2419Sahih

أَخْبَرَنَا إِبْرَاهِيمُ بْنُ سَعِيدٍ الْجَوْهَرِيُّ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ فُضَيْلٍ، عَنِ الْحَسَنِ بْنِ عُبَيْدِ اللَّهِ، عَنْ هُنَيْدَةَ الْخُزَاعِيِّ، عَنْ أُمِّهِ، عَنْ أُمِّ سَلَمَةَ، قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَأْمُرُ بِصِيَامِ ثَلاَثَةِ أَيَّامٍ أَوَّلِ خَمِيسٍ وَالاِثْنَيْنِ وَالاِثْنَيْنِ ‏.‏

It was narrated that Umm Salamah said:"The Messenger of Allah used to enjoin fasting three days: The first Thursday, and Monday and Monday

Scholarly Authentication

The label above is the grade most of these scholars gave, each scholar counted once — 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. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. Each scholar's own wording:

Al-AlbaniShadh
Zubair Ali ZaiSahih

Our source also lists this ruling under Abu Ghuddah, the editor of the printed edition it was taken from. It is al-Albani's ruling printed again, so it is counted once.

In-book reference: 22:330