The Book on Salutations and Greetings (Kitab As-Salam)
Muslim :: Book 26 : Hadith 5427
Ibn 'Abbas reported Allah's Messenger (may peace be upon him) as saying: The influence of an evil eye is a fact; if anything would precede the destiny it would be the influence of an evil eye, and when you are asked to take bath (as a cure) from the influence of an evil eye, you should take bath.