Sunan an-Nasa'i 2231
سنن النسائي#2231Sahihأَخْبَرَنَا عَلِيُّ بْنُ الْحُسَيْنِ، قَالَ حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ، عَنِ ابْنِ إِسْحَاقَ، عَنْ سَعِيدِ بْنِ أَبِي هِنْدٍ، عَنْ مُطَرِّفٍ، قَالَ دَخَلْتُ عَلَى عُثْمَانَ بْنِ أَبِي الْعَاصِ فَدَعَا بِلَبَنٍ فَقُلْتُ إِنِّي صَائِمٌ . فَقَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " الصَّوْمُ جُنَّةٌ مِنَ النَّارِ كَجُنَّةِ أَحَدِكُمْ مِنَ الْقِتَالِ " .
It was narrated that Mutarrif said:"I entered upon 'Uthman bin Abi Al-As and he called for milk. I said: I am fasting; He said: "I heard the Messenger of Allah say: 'Fasting is a shield like the of any one of you in battle."' Abu Hurairah said: "The Messenger of Allah said: 'Fasting is a shield."' (Sahih)
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: 22:142