842. Abu Qatadah (May Allah be pleased with him) reported: The Prophet (PBUH) said, "A good vision (dream) is from Allah and a bad dream is from the Satan. He who sees something in a dream that he dislikes, should blow thrice on his left, must seek Allah's Refuge from the evil of the Satan (i.e., by saying: A`udhu billahi minash-Shaitanir-Rajim). Then it will not harm him.''
[Al-Bukhari and Muslim].
Commentary: As mentioned in the preceding Hadith, there are good dreams and bad dreams. This Hadith shows us what to do in order to avoid the evil of Satan who cannot harm anyone except by Allah's leave.
843. Jabir (May Allah be pleased with him) reported: Messenger of Allah (PBUH) 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].
Commentary: This Hadith makes an addition to the preceding ones, that is, on seeing a bad dream, one should change his side. If he is lying on his right side, he should turn to the left, and vice versa. By this precaution Allah will turn a bad dream into a good one by His leave.