Do your business dealings honestly without taking advantage of others through unfair means such as usurious transactions etc., Make sure to do your exchanges immediately without any delay so as not to fall into sinning by doing usurious transactions .

This hadith discusses the prohibition of riba or usury in Islam. Usury is defined as taking an unfair advantage when trading goods or services by charging an additional amount for a loan or exchange. In this hadith it was narrated that Malik bin Aws brought some dinars to exchange with Talhah bin 'Ubaidullah but Talhah asked him to wait until his storekeeper came. Umar then asked about this situation and it was revealed that Prophet Muhammad said that exchanging silver for gold or wheat for wheat etc should be done immediately otherwise it would be considered as usury which is forbidden in Islam. This hadith teaches us that we should not take advantage of others when trading goods and services and we should always make sure to do our exchanges immediately without any delay so as not to fall into sinning by doing usurious transactions.