Abu Sa'id Al-Khudri reported that he heard the Prophet, peace be upon him, saying, "When someone among you sees a good and pleasing dream, he should know that it is from Allah, and so he should praise and thank Allah, and describe to others what he saw in the dream. But if he sees something he dislikes then it is from Satan, so he should seek Allah's refuge from its evil and should not mention it to anyone. It will not harm him." (Reported by Tirmidhi and Bukhari)
Abu Hurayrah narrated Muhammad (S) said, "There are three types of dreams: a righteous dream which is glad tidings from Allah, the dream which causes sadness is from Shaitan, and a dream from the ramblings of the mind. (Sahih Muslim)
Muhammad (S) said, ...If he has a dream that he dislikes, then it is from Shaitan. He should seek refuge with Allah from its evil, and he SHOULD NOT MENTION IT TO ANYBODY, then it will not harm him." (Sahih Al-Bukhari) If one does tell somebody about the bad dream then there could be the chance that some harm will come out of it.
Abu Qutaadah said: the Prophet (peace and blessings of Allahbe upon him) said: “Good dreams come from Allah, and (bad) dreams come from Shaytaan. Whoever sees something that he dislikes, let him spit to his left three times and seek refuge with Allahfrom the Shaytaan, for it will not harm him.” (Narrated by al-Bukhaari, 6594, and Muslim, 5862). The “spitting” referred to here is a soft, dry spitting with no saliva ejected.
