The Dictations · Hadith 533 (#Ḥadīth #3)
Chapter 54 | The Fifty-Forth Assembly, the Assembly of Tuesday, the First of Rabi` al-Akhir, 368 AH.
3 - وبهذا الاسناد، قال: قال رسول الله (صلى الله عليه وآله): من فارق جماعة المسلمين فقد خلع ربقة الاسلام من عنقه، قيل: يا رسول الله، وما جماعة المسلمين؟ قال: جماعة أهل الحق وإن قلوا (2).
By this isnad, he said: The Messenger of Allah (s) said: Whoever splits away from the Muslim community has taken the collar of Islam off his neck. It was said: O Messenger of Allah! What is the Muslim community? He said: The community of the people of truth, even if they are few.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).