Volume 3, Book 48, Number 853:
Narrated Aisha:
Whenever Allah’s Apostle intended to go on a journey, he used to draw lots among his wives and
would take with him the one on whom the lot fell. He also used to fix for everyone of his wives a day
and a night, but Sauda bint Zam’a gave her day and night to ‘Aisha, the wife of the Prophet intending
thereby to please Allah’s Apostle.