It is narrated from Hazrat Nafi‘ that Hazrat Abdullah bin Umar (may Allah be pleased with them) said: Zakat is due on your wealth after a full year has passed. Therefore, if there is a debt whose repayment is certain, then zakat should also be paid on it, and if there is doubt about the repayment of a debt, then zakat should not be paid on it until the debtor repays the debt.