(37) باب الْوُضُوءِ بِسُؤْرِ الْكَلْبِ
Narrated Abu Hurairah:
The Prophet (sal Allaahu alayhi wa sallam) said: The purification of the utensil belonging to any one of you, after it has been licked by a dog, consists of washing it seven times, using sand in the first instance.Abu Dawud said : A similar tradition has been narrated by Abu Ayyub and Habib b. al-Shahid on the authority of Muhammad.
Reference: Sunan Abi Dawud 71
In-book reference: Book 1, Hadith 71
English translation: Book 1, Hadith 71