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]. (JA)
App reference (JA): Book 5, Hadith 30 (JA)
Arabic/English book reference (JA): Book 5, Hadith 843 (JA)