Sahih Muslim Book 29, Hadith Number 5642.
Chapter : Do not inform the vain sport of devil in a dream.
Jabir reported that a person came to Allah’s Apostle (may peace be upon him) and said: Allah’s Messenger, I have seen in the state of sleep as if my head had been cut off. Thereupon Allah’s Apostle (may peace be upon him) laughed and said: When the satan plays with any one of you in the state of steep, do not mention it to the people; and in the hadith transmitted by Abu Bakr (the words are): “If one of you is played with, and he did not make any mention of the word: “Satan.”