Sahih al-Bukhari 7480
صحيح البخاري#7480SahihNarrated `Abdullah bin `Umar:The Prophet (ﷺ) besieged the people of Ta'if, but he did not conquer it. He said, "Tomorrow, if Allah will, we will return home. On this the Muslims said, "Then we return without conquering it?" He said, 'Then carry on fighting tomorrow." The next day many of them were injured. The Prophet (ﷺ) said, "If Allah will, we will return home tomorrow." It seemed that statement pleased them whereupon Allah's Apostle smiled
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: 97:106