A DREAM FROM SATAN, THE STONED AND CURSED H 853 "The good vision is from Allah and dreams are from satan. Whosoever sees something he dislikes should spit (without saliva) three times to the left and seek the protection of Allah against satan, then it will cause him no harm." R 853 Bukhari and Muslim with a chain up to Abu Katadah who related that the Prophet, praise and peace be upon him, said this.
841- وعن أَبي قَتَادَة رضي الله عنه ، قَالَ : قَالَ النبيُّ صلى الله عليه وآله وسلم : "الرُّؤْيَا الصَّالِحَةُ - وفي رواية : الرُّؤْيَا الحَسَنَةُ - مِنَ اللهِ ، وَالحُلُمُ مِنَ الشَّيْطَانِ ، فَمَنْ رَأى شَيْئاً يَكْرَهُهُ فَلْيَنْفُثْ عَن شِمَالِهِ ثَلاَثاً ، وَلْيَتَعَوَّذْ مِنَ الشَّيْطَانِ ؛ فإنَّهَا لا تَضُرُّهُ" متفقٌ عَلَيْهِ . " النَّفْثُ" : نَفْخٌ لَطِيفٌ لا رِيقَ مَعَهُ .