Sahih Muslim 6117
صحيح مسلم#6117SahihThis hadith has been transmitted on the authority of 'Amir b. Sa'd and the words are. Allah's Messenger (ﷺ) said:The greatest sinner of the Muslims amongst Muslims is one who asked about a certain thing which had not been prohibited and it was prohibited because of his asking about it
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: 43:175