Sahih Muslim 615
صحيح مسلم#615SahihAba Qatada reported:The Messenger of Allah (way peace be upon him) forbade (us) to breathe into the venel, to touch the penis with the right hand and to wipe after relieving with right hand
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: 2:82