Bulugh al-Maram 1 The Book of Purification كتاب الطهارة 11

وَعَنْ أَبِي هُرَيْرَةَ – رضى الله عنه – قَالَ: قَالَ رَسُولُ اَللَّهِ – صلى الله عليه وسلم -{ طَهُورُ إِنَاءِ أَحَدِكُمْ إِذْ وَلَغَ فِيهِ اَلْكَلْبُ أَنْ يَغْسِلَهُ سَبْعَ مَرَّاتٍ, أُولَاهُنَّ بِالتُّرَابِ } أَخْرَجَهُ مُسْلِمٌ 1 . 1 – صحيح. رواه مسلم (279) (91) .

Narrated Abu Huraira (rad): Narrated by Abu Huraira (rad): Allah’s Messenger (صلى الله عليه وسلم) said: “The cleansing of the utensil belonging to one of you, after it has been licked by a dog, is to wash it seven times, and using soil for cleaning at the first time.” [Muslim reported it].