What did the Prophet Muhammad (saw) advise Ka'b to do when he and `Abdullah bin Abi Hadrad Al-Aslami were arguing about a debt?
 Narrated `Abdullah bin Ka`b bin Malik Al-Ansari from Ka`b bin Malik:                     That `Abdullah bin Abi Hadrad Al-Aslami owed him some debt. Ka`b met him and caught hold of him and they started talking and their voices grew loudest. The Prophet passed by them and addressed Ka`b, pointing out to him to reduce the debt to one half. So, Ka`b got one half of the debt and exempted the debtor from the other half.