Sahih al-Bukhari 6
صحيح البخاري#6SahihNarrated Ibn 'Abbas: Allah's Messenger (ﷺ) was the most generous of all the people, and he used to reach the peak in generosity in the month of Ramadan when Gabriel met him. Gabriel used to meet him every night of Ramadan to teach him the Qur'an. Allah's Messenger (ﷺ) was the most generous person, even more generous than the strong uncontrollable wind (in readiness and haste to do charitable deeds)
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: 1:6