Sahih Muslim | Book 8 | Chapter 11

Narrated by 'Aisha (Allah be pleased with her)
'Aisha (Allah be pleased with her) reported: Allah's Messenger (may peace be upon him) contracted marriage with me in Shawwal and took me to his house as a bride during Shawwal. And who among the wives of Allah's Messenger (may peace be upon him) was dearer to him than I, and' 'Aisha liked that the women (of her family) should enter the houses as brides during the month of Shawwal.

Narrated by Sufyan
This hadith has been narrated on the authority of Sufyan with the same chain of transmitters, but he made no mention of the act of 'Aisha (being admitted as a wife in the house of the Holy Prophet).