Ibrahim bin al-Hasan bin al-Hythm إبراهيم بن الحسن بن الهيثم · The Book of Purification

"The Messenger of Allah (ﷺ) said: 'If a dog licks the vessel of any one of you, let him wash it seven times.'"

A similar Hadith was narrated from Abu Hurairah from Prophet (ﷺ).

"My father 'Ali called me to bring (water for) Wudu', so I brought it to him, and he started by washing his hands three times, before putting them into the water. Then he rinsed his mouth three times and sniffed water into his nose and blew it out three times. Then he washed his face three times, then his right hand up to the elbow three times, then his left likewise. Then he wiped his head once then he washed…