Sahih Bukhari Volume 9, Book 87, Hadith Number 140.

Narrated By ‘Aisha : Allah’s Apostle said to me, “You were shown to me twice (in my dream) before I married you. I saw an angel carrying you in a silken piece of cloth, and I said to him, ‘Uncover (her),’ and behold, it was you. I said (to myself), ‘If this is from Allah, then it must happen.’ Then you were shown to me, the angel carrying you in a silken piece of cloth, and I said (to him), ‘Uncover (her), and behold, it was you. I said (to myself), ‘If this is from Allah, then it must happen.'”