Sunan Ibn Majah 967
سنن ابن ماجه#967Da'ifحَدَّثَنَا عَلْقَمَةُ بْنُ عَمْرٍو الدَّارِمِيُّ، حَدَّثَنَا أَبُو بَكْرِ بْنُ عَيَّاشٍ، عَنْ مُحَمَّدِ بْنِ عَجْلاَنَ، عَنْ سَعِيدٍ الْمَقْبُرِيِّ، عَنْ كَعْبِ بْنِ عُجْرَةَ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ رَأَى رَجُلاً قَدْ شَبَّكَ أَصَابِعَهُ فِي الصَّلاَةِ فَفَرَّجَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ بَيْنَ أَصَابِعِهِ .
It was narrated from Ka’b bin ‘Ujrah that the Messenger of Allah (ﷺ) saw a man who had interlocked his fingers during the prayer, so the Messenger of Allah (ﷺ) separated his fingers
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: 5:165