Jami` at-Tirmidhi 686
جامع الترمذي#686Sahihحَدَّثَنَا أَبُو سَعِيدٍ عَبْدُ اللَّهِ بْنُ سَعِيدٍ الأَشَجُّ، حَدَّثَنَا أَبُو خَالِدٍ الأَحْمَرُ، عَنْ عَمْرِو بْنِ قَيْسٍ الْمُلاَئِيِّ، عَنْ أَبِي إِسْحَاقَ، عَنْ صِلَةَ بْنِ زُفَرَ، قَالَ كُنَّا عِنْدَ عَمَّارِ بْنِ يَاسِرٍ فَأُتِيَ بِشَاةٍ مَصْلِيَّةٍ فَقَالَ كُلُوا . فَتَنَحَّى بَعْضُ الْقَوْمِ فَقَالَ إِنِّي صَائِمٌ . فَقَالَ عَمَّارٌ مَنْ صَامَ الْيَوْمَ الَّذِي يَشُكُّ فِيهِ النَّاسُ فَقَدْ عَصَى أَبَا الْقَاسِمِ صلى الله عليه وسلم . قَالَ وَفِي الْبَابِ عَنْ أَبِي هُرَيْرَةَ وَأَنَسٍ . قَالَ أَبُو عِيسَى حَدِيثُ عَمَّارٍ حَدِيثٌ حَسَنٌ صَحِيحٌ . وَالْعَمَلُ عَلَى هَذَا عِنْدَ أَكْثَرِ أَهْلِ الْعِلْمِ مِنْ أَصْحَابِ النَّبِيِّ صلى الله عليه وسلم وَمَنْ بَعْدَهُمْ مِنَ التَّابِعِينَ وَبِهِ يَقُولُ سُفْيَانُ الثَّوْرِيُّ وَمَالِكُ بْنُ أَنَسٍ وَعَبْدُ اللَّهِ بْنُ الْمُبَارَكِ وَالشَّافِعِيُّ وَأَحْمَدُ وَإِسْحَاقُ كَرِهُوا أَنْ يَصُومَ الرَّجُلُ الْيَوْمَ الَّذِي يُشَكُّ فِيهِ وَرَأَى أَكْثَرُهُمْ إِنْ صَامَهُ فَكَانَ مِنْ شَهْرِ رَمَضَانَ أَنْ يَقْضِيَ يَوْمًا مَكَانَهُ .
Silah bin Zufar said:"We were with Ammar bin Yasir when a roasted sheep was brought and he said: 'Eat.' Someone among the people said: 'I am fasting.' So Ammar said: 'Whoever fasts on a day in which there is doubt, then he has disobeyed Abul-Qasim (pbuh)
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: 8:5