Sahih Bukhari
Merits of the Helpers in Madinah (Ansaar)
Volume: 005 / Book Number: 058 / Hadith Number: 235
Narrated 'Aisha:
That the Prophet said to her, "You have been shown to me twice in my dream. I saw you pictured on a piece of silk and some-one said (to me). 'This is your wife.' When I uncovered the picture, I saw that it was yours. I said, 'If this is from Allah, it will be done."