Sahih al-Bukhari 2593
صحيح البخاري#2593SahihNarrated Aisha:Whenever Allah's Messenger (ﷺ) wanted to go on a journey, he would draw lots as to which of his wives would accompany him. He would take her whose name came out. He used to fix for each of them a day and a night. But Sauda bint Zam`a gave up her (turn) day and night to `Aisha, the wife of the Prophet in order to seek the pleasure of Allah's Messenger (ﷺ) (by that action)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 51:27