Sahih al-Bukhari 7289
صحيح البخاري#7289SahihNarrated Sa`d bin Abi Waqqas:The Prophet (ﷺ) said, "The most sinful person among the Muslims is the one who asked about something which had not been prohibited, but was prohibited because of his asking
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 96:20