Sahih Muslim Book 5, Hadith Number 2242.

Chapter : Exhortation to spend (for the sake of Allah) and disapproval of calculating (the articles of charity).

Abu Huraira reported that the Messenger of Allah (may peace be upon him) said: Who has observed fast among you today? Abu Bakr (Allah be pleased with him) replied: It is I. He (the Holy Prophet again) said: Who among you followed the bier today? Abu Bakr (Allah be pleased with him) replied: It is I. He (the Holy Prophet again) said: Who among you led a poor man today? Abu Bakr (Allah he pleased with him) replied: It is I. He (again) said: Who among you visited an invalid today? Abu Bakr (Allah be pleased with him) said: It is I. Upon this the Messenger of Allah (may peace be upon him) said: Anyone in whom (these good deeds) are combined will certainly, enter paradise.