Sahih Al Bukhari – Book of Beginning Of Creation
Volumn 004, Book 054, Hadith Number 443.
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Narated By Ibn 'Abbas RA : Allah's Apostle PBUH was the most generous of all the people, and he used to be more generous in the month of Ramadan when Gabriel used to meet him. Gabriel used to meet him every night in Ramadan to study the Holy Quran carefully together. Allah's Apostle used to become more generous than the fast wind when he met Gabriel.