Sunan Ibn Majah 1774
سنن ابن ماجه#1774Da'ifحَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى، حَدَّثَنَا نُعَيْمُ بْنُ حَمَّادٍ، حَدَّثَنَا ابْنُ الْمُبَارَكِ، عَنْ عِيسَى بْنِ عُمَرَ بْنِ مُوسَى، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ أَنَّهُ كَانَ إِذَا اعْتَكَفَ طُرِحَ لَهُ فِرَاشُهُ - أَوْ يُوضَعُ لَهُ سَرِيرُهُ وَرَاءَ أُصْطُوَانَةِ التَّوْبَةِ .
It was narrated from Ibn ‘Umar that:When the Prophet (ﷺ) observed I’tikaf, his bedding would be spread for him, or his bed would be placed there for him, behind the Pillar of Repentance
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: 7:137