Sahih al-Bukhari 7503
صحيح البخاري#7503SahihNarrated Zaid bin Khalid:It rained (because of the Prophet's invocation for rain) and the Prophet (ﷺ) said, "Allah said, 'Some of My slaves have become disbelievers in Me, and some others, believers in Me
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: 97:128