Sahih al-Bukhari 1124
صحيح البخاري#1124SahihNarrated Jundab:The Prophet (ﷺ) became sick and did not get up (for Tahajjud prayer) for a night or two
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: 19:4