Sunan Ibn Majah 4118
سنن ابن ماجه#4118Sahihحَدَّثَنَا كَثِيرُ بْنُ عُبَيْدٍ الْحِمْصِيُّ، حَدَّثَنَا أَيُّوبُ بْنُ سُوَيْدٍ، عَنْ أُسَامَةَ بْنِ زَيْدٍ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي أُمَامَةَ الْحَارِثِيِّ، عَنْ أَبِيهِ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " الْبَذَاذَةُ مِنَ الإِيمَانِ " . قَالَ الْبَذَاذَةُ الْقَشَافَةُ يَعْنِي التَّقَشُّفَ .
It was narrated from ‘Abdullah bin Abi Umamah Al-Harithi that his father said:“The Messenger of Allah (ﷺ) said: ‘Simplicity is part of faith.’”
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:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif
In-book reference: 37:19