كتاب التعبير
Read the English translation first, with the original Arabic directly underneath.
Narrated Abu Qatada:
The Prophet (ﷺ) said, "A good dream that comes true is from Allah, and a bad dream is from Satan, so if anyone of you sees a bad dream, he should seek refuge with Allah from Satan and should spit on the left, for the bad dream will not harm him."
الرُّؤْيَا الصَّالِحَةُ مِنَ اللَّهِ، وَالْحُلْمُ مِنَ الشَّيْطَانِ، فَإِذَا حَلَمَ فَلْيَتَعَوَّذْ مِنْهُ وَلْيَبْصُقْ عَنْ شِمَالِهِ، فَإِنَّهَا لاَ تَضُرُّهُ