Abu Musa Al-Ash'ari Radiyallahu 'anhu narrates that Rasullullah Sallallahu 'alaihi wasallam said: Undoubtedly amongst the greatest sins in Allah's sight which a man commits, after the major sins which Allah has prohibited, is that a man should die in debt, without making any arrangement for it to be paid off. (Abu Dawud: 3342)