Oneness, Uniqueness of Allah (Tawheed)

Bukhari :: Book 9 :: Volume 93 :: Hadith 517

Narrated Anas bin Malik:

The Verse of Al-Hijab (veiling of women) was revealed in connection with Zainab bint Jahsh. (On the day of her marriage with him) the Prophet gave a wedding banquet with bread and meat; and she used to boast before other wives of the Prophet and used to say, "Allah married me (to the Prophet in the Heavens."