Musnad Abu Ya'la al-Mawsili 151:59

Salih ibn Harb Abu Ma'mar narrated to us, Salam ibn Abi Khubzah narrated to us, 'Asim ibn Abi al-Najud narrated to us, from Zirr ibn Hubaysh, from 'Abdullah, who said: The Messenger of Allah (ﷺ) said: "Whoever keeps a dog, other than a sheepdog or a hunting dog, two qirats of his reward will be deducted every day."