Jami` at-Tirmidhi 761
جامع الترمذي#761Hasanحَدَّثَنَا مَحْمُودُ بْنُ غَيْلاَنَ، حَدَّثَنَا أَبُو دَاوُدَ، قَالَ أَنْبَأَنَا شُعْبَةُ، عَنِ الأَعْمَشِ، قَالَ سَمِعْتُ يَحْيَى بْنَ سَامٍ، يُحَدِّثُ عَنْ مُوسَى بْنِ طَلْحَةَ، قَالَ سَمِعْتُ أَبَا ذَرٍّ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " يَا أَبَا ذَرٍّ إِذَا صُمْتَ مِنَ الشَّهْرِ ثَلاَثَةَ أَيَّامٍ فَصُمْ ثَلاَثَ عَشْرَةَ وَأَرْبَعَ عَشْرَةَ وَخَمْسَ عَشْرَةَ " . وَفِي الْبَابِ عَنْ أَبِي قَتَادَةَ وَعَبْدِ اللَّهِ بْنِ عَمْرٍو وَقُرَّةَ بْنِ إِيَاسٍ الْمُزَنِيِّ وَعَبْدِ اللَّهِ بْنِ مَسْعُودٍ وَأَبِي عَقْرَبٍ وَابْنِ عَبَّاسٍ وَعَائِشَةَ وَقَتَادَةَ بْنِ مِلْحَانَ وَعُثْمَانَ بْنِ أَبِي الْعَاصِي وَجَرِيرٍ . قَالَ أَبُو عِيسَى حَدِيثُ أَبِي ذَرٍّ حَدِيثٌ حَسَنٌ . وَقَدْ رُوِيَ فِي بَعْضِ الْحَدِيثِ أَنَّ " مَنْ صَامَ ثَلاَثَةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ كَانَ كَمَنْ صَامَ الدَّهْرَ " .
Abu Dharr narrated that :the Messenger of Allah said: "O Abu Dharr! When you fast three days out of a month, then fast the thirteenth, fourteenth, and fifteenth
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:
Our source also lists this ruling under Ahmad Muhammad Shakir, 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: 8:80