Sahih Muslim 3744
صحيح مسلم#3744SahihSahl b. Sa'd reported.. 'Uwaimir al-Ansari (Allah be pleased with him) from Banu'l-'Ajlan came to 'Asim b. 'Adi (Allah be pleased with him) the remaining part of the hadith is the same and it was also reecorded in it:" And subsequebtly the separation became the practice of al-Mutala'inain." And this addition was also made:" She was pregnant and her son was ascribed to her, and it became customary that such (a son) would inherit her and she would inherit him in the share prescribed by Allah for her
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: 19:2