The Book of Zakat (Kitab Al-Zakat)
Muslim :: Book 5 : Hadith 2209
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: The Last Hour will not come till wealth is abundant and overflowing, so much so that the owner of the property will think as to who will accept Sadaqa from him, and a person would be called to accept Sadaqa and he would say: I do not need it.