Ishaq bin Ibrahim bin Muhammad إسحاق بن إبراهيم بن محمد · The Book of Water

"A man asked the prophet (ﷺ): 'O Messenger of Allah, we travel by sea and we take a little water with us, but if we use it for Wudu', we will go thirsty. Can we perform Wudu' with seawater?' The Messenger of Allah (ﷺ) said: 'Its water is a means of purification and its dead meat is permissible.'"

"The Messenger of Allah (ﷺ) commanded that dogs be killed. He said: 'What do they have to do with dogs?' And he granted a concession regarding hunting dogs and sheepdogs. And he said: 'If a dog licks a vessel, wash it seven times, and rub it the eighth time with dust.' Abu Hurairah differed from him and said: 'Rub it one time with dust.'"

"If a dog licks the vessel of any one of you, let him wash it seven times, the first time with dust."

"The Messenger of Allah (ﷺ) used to perform Ghusl with a Mudd and Ghusl with a Sa'."