Hazrat Ubaidah narrates that Hazrat Ali (may Allah be pleased with him) was asked: If a person has lent someone money but its return is not certain, should he pay its zakat? He replied: If the debtor is truthful, then after receiving the amount, zakat should be paid for all the years that have passed.

Hazrat Usman bin Abu Usman says that I asked Hazrat Qasim bin Muhammad: Some of my debt is for a fixed term and some is not for a fixed time, so should we pay zakat on it? He replied, "Yes." Hazrat Aisha (may Allah be pleased with her) instructed us that whatever is in the sea, zakat is due on it. The narrator says that I asked Hazrat Salim the same question, and he also gave the same answer.