Sahih Muslim 3567
صحيح مسلم#3567SahihSa'd b. Abu Waqqas (Allah be pleased with him) reported that a person came to Allah's Messenger (ﷺ) and said:I do 'azi with my wife. Thereupon Allah's Messenger (ﷺ) said: Why do you do that? The person said: I fear harm to her child or her children. Thereupon Allah's Messenger (way peace be upon him) said: If that were harmful it would harm the Persians and the Greeks
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: 16:169