Sahih Muslim 3547
صحيح مسلم#3547SahihAbu Sa'id al-Khudri (Allah be pleased with him) (was asked if he had heard it himself), to which he said:Yes. (I heard) Allah's Apostle (ﷺ) as saying: There is no harm if you do not practise it, for it (the birth of the child) is something ordained (by Allah)
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: 16:149