´" Ibn 'Abbas narrated that the Messenger of Allah (s.a.w) said:` "If there was anything that could overcome the Decree then the (evil) eye would overcome it, and when you are requested to wash (due to it) then wash."
Hadith Referenceسنن ترمذي / كتاب الطب عن رسول اللَّهِ صلى الله عليه وسلم / 2062