Sunan Ibn Majah 965
سنن ابن ماجه#965Da'ifحَدَّثَنَا يَحْيَى بْنُ حَكِيمٍ، حَدَّثَنَا أَبُو قُتَيْبَةَ، حَدَّثَنَا يُونُسُ بْنُ أَبِي إِسْحَاقَ، وَإِسْرَائِيلُ بْنُ يُونُسَ، عَنْ أَبِي إِسْحَاقَ، عَنِ الْحَارِثِ، عَنْ عَلِيٍّ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ قَالَ " لاَ تُفَقِّعْ أَصَابِعَكَ وَأَنْتَ فِي الصَّلاَةِ " .
It was narrated from ‘Ali that the Messenger of Allah (ﷺ) said:“Do not crack your fingers during the prayer.”
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-AlbaniDaif
Muhammad Fouad Abd al-BaqiDaif
Zubair Ali ZaiDaif
In-book reference: 5:163