Musnad Ahmad 1153:263

Yahya ibn Sa'id narrated to us, from Sufyan, from Isma'il ibn Umayyah, who said: 'Abdullah ibn 'Urwah narrated to me, from his father, from 'Aishah, who said: "The Messenger of Allah (peace and blessings of Allah be upon him) married me in Shawwal, and I was brought into his house in Shawwal. So which of his wives was more favored by him than I? And she (Aishah) used to like for her women to be brought into their houses in Shawwal."