Sunan Ibn Majah 1315
سنن ابن ماجه#1315Da'ifحَدَّثَنَا جُبَارَةُ بْنُ الْمُغَلِّسِ، حَدَّثَنَا حَجَّاجُ بْنُ تَمِيمٍ، عَنْ مَيْمُونِ بْنِ مِهْرَانَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ يَغْتَسِلُ يَوْمَ الْفِطْرِ وَيَوْمَ الأَضْحَى .
It was narrated that Ibn ‘Abbas said:“The Messenger of Allah (ﷺ) used to have a bath on the day of Fitr and the day of Adha.”
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-AlbaniVery Daif
Muhammad Fouad Abd al-BaqiVery Daif
Zubair Ali ZaiDaif
In-book reference: 5:513