Sahih al-Bukhari 6409
صحيح البخاري#6409SahihNarrated Abu Musa Al-Ash`ari:The Prophet (ﷺ) started ascending a high place or hill. A man (amongst his companions) ascended it and shouted in a loud voice, "La ilaha illal-lahu wallahu Akbar." (At that time) Allah's Messenger (ﷺ) was riding his mule. Allah's Messenger (ﷺ) said, "You are not calling upon a deaf or an absent one." and added, "O Abu Musa (or, O `Abdullah)! Shall I tell you a sentence from the treasure of Paradise?" I said, "Yes." He said, "La haul a wala quwwata illa billah
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: 80:104