Narrator:Abu Hurayrah
وَإِذَا وَلَغَ الْكَلْبُ فِي إِنَاءِ أَحَدِكُمْ فَلَا يَتَوَضَّأْ حَتَّى يَغْسِلَهَا سَبْعَ مَرَّاتٍ
This hadith has no English translation yet: the Arabic text, the reference and the grade are shown here.
Reported by Ahmad (No. 9119, 7043, 7135, 7140, 7348, 7804, 8368, 8369), Al-Bukhari (No. 172, 2378), Muslim (No. 279a, 279b, 279c, 2098a), An-Nasa’i (No. 63, 64, 66, 335, 338, 339, 5369, 5370), Ibn Majah (No. 363, 364) and Malik (No. 66).