قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " طَهُورُ إِنَاءِ أَحَدِكُمْ إِذَا وَلَغَ الْكَلْبُ فِيهِ : فَلْيَغْسِلْهُ سَبْعَ مَرَّاتٍ "
The Messenger of Allah, peace and blessings be upon him, said: "When a dog licks the utensil of any one of you, he should wash that utensil seven times (to purify it)."