Sunan an-Nasa'i 4290
سنن النسائي#4290SahihIt was narrated from Abu Hurairah that the Messenger of Allah said:"Whoever keeps a dog that is not a dog used for hunting, herding livestock or guarding land, two qirats will be deducted from his reward each day
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 42:28