Sahih Muslim 3669
صحيح مسلم#3669SahihIbn Tawus narrated on the authority of his father that Ibn 'Umar (Allah be pleased with them) was asked about the person who divorced his wife in the state of menses, whereupon he said:Do you know 'Abdullah b. Umar? He said: Yes. He said: It was he who divorced his wife jn the state of menses and 'Umar went to Allah's Apostle (ﷺ) and gave him this information. and he commanded him that he should take her back; and he (Abu Tawus) said: I did not hear any addition to this (hadith) from my father
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: 18:18