Of the a hadith narrated by Abu Huraira from Muhammad, the Messenger of Allah (ﷺ), one is this: The Messenger of Allah (ﷺ) said: The purification of the utensil belonging to one amongst you, after it is licked by a dog, lies in washing it seven times.
Sahih Muslim Book 2, Hadith 118
← Previous Hadith The Messenger of Allah (ﷺ) said: The purification of the utensil belonging to any one of you, after it is licked by a dog, lies in washing it seven times, using sand for the first time.

Sahih Muslim Book 2, Hadith 117 Next Hadith → The Messenger of Allah (ﷺ) ordered killing of the dogs, and then said: What about them, i. e. about other dogs? and then granted concession (to keep) the dog for hunting and the dog for (the security) of the herd, and said: When the dog licks the utensil, wash it seven times, and rub it with earth the eighth time.

Sahih Muslim Book 2, Hadith 119