The Sufficient (Vol 1) · Hadith 1055 (#Ḥadīth #4)
Chapter 103 | The Commands of the Holy Prophet to Wish Well for the Imams of Muslims, Remain Close with their Group and as to Who They are.
4ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ فَضَّالٍ عَنْ أَبِي جَمِيلَةَ عَنْ مُحَمَّدٍ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ الله قَالَ مَنْ فَارَقَ جَمَاعَةَ الْمُسْلِمِينَ قِيدَ شِبْرٍ فَقَدْ خَلَعَ رِبْقَةَ الاسْلامِ مِنْ عُنُقِهِ.
4. A number of our people has narrated from Ahmad ibn Muhammad from ibn al-Faddal from abu Jamila from Muhammad al-Halabi from abu ‘Abdallah who has said the following. “Whoever would distance himself from the company the Muslims even by one shibr (one foot) he has removed the band of allegiance with Islam from his neck.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).