Ibn 'Abbas said (may Allah be well pleased with him and his father): ‘Allah’s Messenger (Allah bless him and give him peace) was the most generous of humankind in charity, and he was at his most charitable in the month of Ramadan, until it was concluded. Gabriel would then come to him and present the Qur’an to him, and when Gabriel met him, Allah’s Messenger (Allah bless him and give him peace) was more generous in charity than the winds sent with showering rain.”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَبْدُ اللهِ بْنُ عِمْرَانَ أَبُو الْقَاسِمِ الْقُرَشِيُّ الْمَكِّيُّ، قَالَ: حَدَّثَنَا إِبْرَاهِيمُ بْنُ سَعْدٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عُبَيْدِ اللهِ، عَنِ ابْنِ عَبَّاسٍ، قَالَ: كَانَ رَسُولُ اللهِ صلى الله عليه وسلم، أَجْوَدَ النَّاسِ بِالْخَيْرِ، وَكَانَ أَجْوَدَ مَا يَكُونُ فِي شَهْرِ رَمَضَانَ، حَتَّى يَنْسَلِخَ، فَيَأْتِيهِ جِبْرِيلُ، فَيَعْرِضُ عَلَيْهِ الْقُرْآنَ، فَإِذَا لَقِيَهُ جِبْرِيلُ كَانَ رَسُولُ اللهِ صلى الله عليه وسلم، أَجْوَدَ بِالْخَيْرِ مِنَ الرِّيحِ الْمُرْسَلَةِ.
sunnah.com