Muhammad bin 'Abdullah bin Numayr محمد بن عبد الله بن نمير · Chapters on Hunting

“The Messenger of Allah (ﷺ) said: ‘Whoever keeps a dog, one Qirat will be deducted from him (good) deeds every day, except a dog for farming or herding livestock.”

“Were it not that dogs form one of the communities (or nations – of creatures), I would have commanded that they be killed. But kill those that are all black. There are no people who keep a dog, except for dogs used for herding livestock, hunting or farming, but two Qirat will be deducted from their reward each day.”

“The Messenger of Allah (ﷺ) said: ‘The water of the sea is a means of purification and its dead meat is permissible.’”