Narrated Abu Hurairah (radiyallaahu-anhu): The Prophet (sallal-laahu-alayhi-wasallam) said: ‘Everyday two angels come down from heaven and one of them says, ‘O Allaah! Compensate every person who spends in Your Cause’, and the other (angel) says, ‘O Allaah destroy every miser.’

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[Bukhari, No:1442]