‏الطهارة : Hadeeth No:548 Abu Huraira reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: When a dog drinks out of a vessel belonging to any one of you, he must wash it seven times....

‏الصلاة : Hadeeth No:1310 This hadith has been narrated by Hisham with the same chain of transmitters....