Sahih Muslim 3554
صحيح مسلم#3554SahihAbu Sa'id al-Khudri (Allah be pleased with him) reported that Allah's Messenger (ﷺ) was asked about 'azl, whereupon he said:The child does not come from all the liquid (sermen) and when Allah intends to create anything nothing can prevent it (from coming into existence)
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: 16:156