Excellent advice to the Muslims 06/06/10

Allah's Apostle (Sallallahu 'Alaihi Wa Sallam) said, "May Allah's mercy be
on him who is lenient in his buying, selling, and in demanding back his
money."  Narrated Jabir bin 'Abdullah (Radi-Allahu 'anhu):

Bukhari Vol. 3 : No. 290