Sahih al-Bukhari 3325
صحيح البخاري#3325SahihNarrated Sufyan bin Abi Zuhair Ash-Shanai:That he heard Allah's Messenger (ﷺ) saying, "If somebody keeps a dog that is neither used for farm work nor for guarding the livestock, he will lose one Qirat (of the reward) of his good deeds everyday
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: 59:131