Narrated Abu Qatada رضي الله عنه : The Prophet صلي الله عليه و سلم said,” a good righteous dreams is from Allahالله, and a bad or evil dream is from Satan; so if anyone of you has a bad dream of which he gets afraid, he should spit on his left side and should seek refuge with Allahالله from it evil, for then it will not harm him.”                                                                           Boukhari

Narrated Abu Huraira رضي الله عنه :The Prophet صلي الله عليه و سلم said , ” if anyone of you rouses from sleep and performs the ablution, he should wash his nose by putting water in it and then blowing it out thrice, because Satan has stayed in the upper part of his nose all the night.”        Boukhari