The Holy Prophet (PBUH)  said, a man was rewarded with paradise because of a fly and other destined to hell.  The companionsasked “How was that?” Upon this the Holy Prophet (PBUH) said: Two people went past a tribe which had an idol.  No one was allowed to go pass without giving them something in the idol’s name.  So, one of them was asked to donate something. He replied that he had nothing to give away.  The tribes’ men insisted that he had to give something even a fly would suffice. The passenger caught a fly and gave to idol.  So, he was let to go and because of that he was destined to hell due to his shirk.  The other passenger was also put forward the same question and he said that he believes in one Allah only and would never give away anything in the name of idol even a fly.  So, they killed him and he was rewarded with paradise (due to his staunch belief in the Oneness of Allah) (By: sister of Ahmed Shah).