Malik related to me from Yahya ibn Said from Abu'l-Hubab Said ibnYasar that the Messenger of Allah, may Allah bless him and grant himpeace, said, "Whoever gives sadaqa from good earning - and Allah onlyaccepts the good - it is as if he placed it in the palm of theMerciful to raise it, as one of you raises his foal or young cameluntil it is like the mountain "
USC-MSA web (English) reference: Book 58, Hadith 1
Arabic reference: Book 58, Hadith 1844