Sahih al-Bukhari Beginning of Creation Sufyan bin 'Abdul Malik سفيان بن عبد الملك المروزي Sahih 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.” https://parallelquran.com/hadith/sahih-al-bukhari-3187/