An oath is a means for selling a commodity and a means for destroying the profit

The Prophet (may Allah's peace and blessings be upon him) warned against swearing oaths and doing so excessively, even if one is truthful in buying and selling. He informed that it may help in promoting goods and merchandise, but it diminishes and nullifies the blessing in profit and earnings. Allah Almighty may bring about ways through which this wealth is destroyed, whether by theft, fire, drowning, seizure, looting, or other means that lead to the loss of one's wealth.