People from the tribe of Banu Tha'labah had come. This tribe was hostile to the tribes of Madinah.An Ansari, recognizing these people , felt and anger inside himself.A member of his family had been killed by the Banu Tha'labah He stood up and told Rasulullah (s), "O Rasulullah, these people have killed members of my family. Today, they have come to us. I beg that you allow the execution of a member at their family.Rasulullah (s) said , "the Qur'an established that no one's burden will fall on any other . Retaliation for father will not be acceptable from the son. Everyone is responsible for his own actions".The Ansari sahabi ( r ) heard this from rasulullah ( s ) and realized that the light of Islam had removed the hatred of kufr.No one should be killed for the crime of another member of the family