Is expiation (kaffarah) for an oath obligatory upon one who swore not to commit a sin then returned to it? And what is meant by the forbidden "breaking of an oath (al-hant)" in the context of swearing to perform an obligation or abstain from a forbidden act? And is feeding ten poor people at once sufficient for a single oath's expiation, or must the feeding be repeated for each oath? And is it permissible to fast three consecutive days for expiation when one is able to feed the poor?

Your committing the sin you swore to abandon is a breach of an oath, and you are obligated to offer expiation for the oath. In addition, you must repent from committing the sin. Merely providing lunch for ten needy persons is not sufficient for expiation; rather, you must give approximately one and a half kilograms of food to each needy person, or feed them two meals (lunch and dinner). It is not permissible to resort to fasting as long as you are able to feed, clothe, or free a slave.