Sahih Muslim 3593
صحيح مسلم#3593SahihUmm Fadl (Allah be pleased with her) reported that Allah's Apostle (ﷺ) said:Being suckled once or twice, or one suckling or two, do not make marriage unlawful
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: 17:26