Narrated Abu Qatada : The prophet (Sallallahu Alaihi Wasllam) said ." A good dream is from Allah (S W T) and a bad dream is from satan . so whoever has seen (in a dream) something he dislike, then he should spit without saliva,trice on his left and seek refuge with Allah (S W T) from satan , for it will not harm him, and satan cannot appear in my shape. (From:- Sahi Al-Bukhari)