Dreams ~ The time of sleep is similar to life in the grave.

Dreams ~ The time of sleep is similar to life in the grave.

And He it is Who makes
The Night as a Robe
For you and Sleep as Repose,
And makes the Day
(As it were a Resurrection)

It is Allah that takes
The souls (of men) at death;
And those that die not
(He takes) during their sleep;
Those on whom He
Has passed the decree
Of death, He Keeps back
(From returning to life),
But the rest he sends
(To their bodies)
For a term appointed.
Verily in this are Signs
For those who reflect

The Prophet صلى الله عليه وآله وسلم said: "The worst lie is that a person claims to have seen a dream which he has not seen."

Abu Qabada reported Allah’s Messenger (Peace be upon him) (The Holy Prophet Muhammed) as saying: "The good visions are from Allah and the evil dreams are from Satan. If one sees a dream which one does not like, one should spit on one’s left side and seek the refuge of Allah from Satan; it will not do any harm, and one should not disclose it to anyone, and if one sees a good vision one should feel pleased but should not disclose it to anyone but whom one loves."

Abu Huraira reported Allah’s Messenger (Peace be upon him) (The Holy Prophet Muhammed) as saying: "When the time draws near (when the Resurrection is near) a believer’s dream can hardly be false. And the truest vision will be of one who is himself the most truthful in speech, for the vision of a Muslim is the forty-fifth part of Prophecy, and dreams are of three types: One, a good dream which is a sort of good tidings from Allah; the evil dream which causes pain and is from Satan; and the third one is a suggestion of one’s own mind; so if any one of you sees a dream which he does not like he should stand up and offer prayer and he should not relate it to people…."

Abu Huraira reported: I heard Allah’s Messenger (Peace be upon him) as saying: "He who saw me in a dream in fact saw me, for Satan does not appear in my form."

http://www.dr-umar-azam.com/dreams_in_islam/dreams_in_islam_1.htm