Qatada قتادة · The Book of Water

"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."

"I heard Anas bin Malik say: 'The Messenger of Allah (ﷺ) used to perform Wudu' with a Makkuk (cup) and Ghusl with five Makkuks (cups).'"

It was narrated from 'Aishah that the Messenger of Allah (ﷺ) used to perform Ghusl with a Mudd and Ghusl with approximately a Sa'.