Sahih al-Bukhari 7005
Sahih al-Bukhari · Book 91: Interpretation of Dreams · A bad dream is from Satan
Narrated Abu Qatada Al-Ansari:
حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ ، حَدَّثَنَا اللَّيْثُ ، عَنْ عُقَيْلٍ ، عَنِ ابْنِ شِهَابٍ ، عَنْ أَبِي سَلَمَةَ ، أَنَّ أَبَا قَتَادَةَ الأَنْصَارِيّ َ ـ وَكَانَ مِنْ أَصْحَابِ النَّبِيِّ صلى الله عليه وسلم وَفُرْسَانِهِ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " الرُّؤْيَا مِنَ اللَّهِ، وَالْحُلْمُ مِنَ الشَّيْطَانِ، فَإِذَا حَلَمَ أَحَدُكُمُ الْحُلُمَ يَكْرَهُهُ فَلْيَبْصُقْ عَنْ يَسَارِهِ وَلْيَسْتَعِذْ بِاللَّهِ مِنْهُ، فَلَنْ يَضُرَّهُ " .
(a companion of the Prophet (ﷺ) and one of his cavalry men) "I heard Allah's Messenger (ﷺ) saying, "A good dream is from Allah, and a bad dream is from Satan; so, if anyone of you had a bad dream which he disliked, then he should spit on his left and seek refuge with Allah from it, for it will not harm him."