If a poor person is given zakah to pay off his debt, and then the creditor releases him from it, does he have to return the zakah?

Question : A man was given [zakah] to pay off his debt, but the creditor released him from the debt and forgave it.

Answer : It is obligatory for him to return the zakah to the one who gave it to him, because the one who gave it to him gave it specifically to pay off the debt, and the debt has now been released from him, so it is obligatory for him to return it to the one from whom he took it.