Sahih Muslim Book 5, Hadith Number 2207.

Chapter : Acceptance of Sadaqa by honest work and its growth.

Abu Musa reported Allah’s Messenger (may peace be upon him) as saying: There would come a time for the people when a person would roam about with Sadaqa of gold, but he would find no one to accept it from him. And a man would be seen followed by forty women seeking refuge with him on account of the scarcity of males and abundance of females.”