Jami` at-Tirmidhi 1487
جامع الترمذي#1487SahihNarrated Ibn 'Umar:That the Messenger of Allah (ﷺ) said: "Whoever keeps a dog" - or: "acquires a dog" - "neither of hunting nor to guard livestock, then two Qirat are deducted from his reward, daily
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 18:29