Sahih al-Bukhari 1235
صحيح البخاري#1235SahihNarrated Asma':I went to `Aisha and she was standing praying and the people, too, were standing (praying). So I said, "What is the matter with the people?" She beckoned with her head towards the sky. I said, "(Is there) a sign?" She nodded intending to say, "Yes
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: 22:13