Sahih Muslim 3438
صحيح مسلم#3438SahihAbu Huraira (Allah be pleased with him) reported:I heard Allah's Messenger (ﷺ) say: Father's sister should not be combined with her brother's daughter, nor the daughter of a sister with her mother's sister
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: 16:41