Riyad as-Saliheen 843
Jabir (May Allah be pleased with him) reported:
Messenger of Allah ﷺ said, "When one of you sees a bad dream let him blow three times on his left, seek refuge in Allah from the Satan three times (i.e., by saying: A'udhu billahi minash-Shaitanir-Rajim) and change the side on which he was lying."
[Muslim].
وعن جابر رضى الله عنه عن رسول الله ﷺ قال:
"إذا رأى أحدكم الرؤيا يكرهها، فليبصق عن يساره ثلاثاً، وليستعذ بالله من الشيطان ثلاثاً، وليتحول عن جنبه الذي كان عليه"
Classification
Sahih (Authentic)
References
Riyad as-Saliheen 843
Riyad as-Saliheen Book of Etiquette of Sleeping, Lying and Sitting etc, Hadith 30