Sahih al-Bukhari 6

Ibn 'Abbas related saying, "The Messenger of Allah, may Allah bless him and grant him peace, was the most generous of people, and he was even more generous in Ramadan when Jibril met him. He used to met him every night in Ramadan to go through the Qur'an with him. The Messenger of Allah, may Allah bless him and grant him peace, was more generous with good than the blowing wind."

‘Abdān related to us, saying: ‘Abd Allāh told us, saying: Yūnus told us, on the authority of az-Zuhrī; [Al-Bukhārī] said: And Bishr ibn Muḥammad related to us the same, saying: ‘Abd Allāh told us, saying: Yūnus and Ma‘mar told us, on the authority of az-Zuhrī, who said: ‘Ubaid Allāh ibn ‘Abd Allāh told me, on the authority of Ibn ‘Abbās, who said: The Apostle of God was the most generous of men; and he was more generous than ever during Ramaḍān, when Gabriel came unto him—and he would come unto him every night during Ramaḍān and impart the knowledge of the Qur’ān unto him; then, indeed, the Apostle of God was more generous in [doing] good than the speeding wind.