Sahih Muslim 6521
صحيح مسلم#6521SahihJubair b. Mutlim reported that his father narrated to him that Allah's Messenger (ﷺ) said:The severer of the tie of kinship would not get into Paradise
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 45:21