Sahih al-Bukhari 1041
صحيح البخاري#1041SahihNarrated Abu Mas`ud:The Prophet (ﷺ) said, "The sun and the moon do not eclipse because of the death of someone from the people but they are two signs amongst the signs of Allah. When you see them stand up and pray
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: 16:2