(16) باب كَرَاهَةِ التَّنَفُّسِ فِي نَفْسِ الإِنَاءِ وَاسْتِحْبَابِ التَّنَفُّسِ ثَلاَثًا خَارِجَ الإِنَاءِ
This hadith is reported on the authority of Anas with a slight variation of wording.
Reference: Sahih Muslim 2028 c
In-book reference: Book 36, Hadith 162
USC-MSA web (English) reference(deprecated numbering scheme): Book 23, Hadith 5031