Musannaf Ibn Abi Shaybah

Hazrat Sha’bi (may Allah have mercy on him) says that if a person said to his creditor, “If I do not pay your due before sunset, then my wife is divorced,” and then he met him the next day and said that he had not paid anything. His wife said to him, “You have divorced me.” Then she took this case to Hazrat Sha’bi (may Allah have mercy on him). Hazrat Sha’bi (may Allah have mercy on him) said, “As far as your wife is concerned, we leave that to your piety, and as for the man’s claim, you must bring evidence that you have paid his due, otherwise pay his due.”