Sahih Bukhari, Volume 1, Book 2, Number 28

Narrated Ibn 'Abbas:

The Prophet said: "I was shown the Hell-fire and that the majority of its dwellers were women who were ungrateful." It was asked, "Do they disbelieve in Allah?" (or are they ungrateful to Allah?) He replied, "They are ungrateful to their husbands and are ungrateful for the favors and the good (charitable deeds) done to them. If you have always been good (benevolent) to one of them and then she sees something in you (not of her liking), she will say, 'I have never received any good from you."

Sahih Bukhari, Volume 1, Book 1, Number 5

Narrated Ibn 'Abbas:

Allah's Apostle 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 Apostle was the most generous person, even more generous than the strong uncontrollable wind (in readiness and haste to do charitable deeds).