Sunan an-Nasa'i 2232
سنن النسائي#2232Hasanأَخْبَرَنِي زَكَرِيَّا بْنُ يَحْيَى، قَالَ حَدَّثَنَا أَبُو مُصْعَبٍ، عَنِ الْمُغِيرَةِ، عَنْ عَبْدِ اللَّهِ بْنِ سَعِيدِ بْنِ أَبِي هِنْدٍ، عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ، عَنْ سَعِيدِ بْنِ أَبِي هِنْدٍ، قَالَ دَخَلَ مُطَرِّفٌ عَلَى عُثْمَانَ نَحْوَهُ مُرْسَلٌ .
It was narrated that Saeed bin Abi Hind said:"Mutarrif entered upon 'Uthman" and he narrated something similar in Mursal from. 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:
Abu Ghuddah-
Zubair Ali ZaiHasan
In-book reference: 22:143