Sahih Muslim · Hadith 4106

حدثنا يحيى بن يحيى، قال قرأت على مالك عن نافع، عن ابن عمر، قال قال رسول الله صلى الله عليه وسلم ‏"‏ من اقتنى كلبا إلا كلب ماشية أو ضاري نقص من عمله كل يوم قيراطان ‏"‏ ‏.‏

Ibn Umar (Allah be pleased with him) reported Allah's Messenger (may peace be upon him) as saying: He who keeps a dog other than that meant for watching the herd or for hunting loses every day out of his deeds equal to two qirat.

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).