Sahih Muslim 3750
صحيح مسلم#3750Sahihوَحَدَّثَنَاهُ ابْنُ أَبِي عُمَرَ، حَدَّثَنَا سُفْيَانُ، عَنْ أَيُّوبَ، سَمِعَ سَعِيدَ بْنَ جُبَيْرٍ، قَالَ سَأَلْتُ ابْنَ عُمَرَ عَنِ اللِّعَانِ، . فَذَكَرَ عَنِ النَّبِيِّ صلى الله عليه وسلم بِمِثْلِهِ .
Sa'id b. Jubair reported:I asked Ibn 'Umar (Allah be pleased with them) about invoking curse (li'an), and he narrated Similarly from Allah's Apostle (ﷺ)
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:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 19:8