Hazrat Abu Qatadah narrates that the Messenger of Allah, peace and blessings be upon him, said: Good dreams are from Allah, and bad dreams are from Satan. So when any one of you sees a bad dream, he should spit three times to his left side and seek refuge from its evil. It will never harm him.

Hazrat Jabir narrates that the Messenger of Allah, peace and blessings be upon him, said: When any one of you sees a dream that he dislikes, he should spit three times to his left and seek Allah’s protection from Satan three times, and he should change the side on which he was lying.

Ibrahim al-Nakha'i says that some of the Companions would supplicate as follows: I seek refuge with those words with which Allah's angels and His messengers sought refuge from the evil of that which I have seen in my sleep, that nothing of that affliction should reach me which I dislike in this world and the Hereafter.