Yahya related that Malik heard al-Ala ibn Abd ar-Rahman say,"Sadaqa does not decrease property, and Allah only increases a slavein worth for his restraint, and no slave is humble but that Allahraises him."Malik said, "I do not know whether this hadithgoes back to the Prophet, may Allah bless him and grant him peace, ornot."
USC-MSA web (English) reference: Book 58, Hadith 12
Arabic reference: Book 58, Hadith 1855