Is expiation (kaffarah) obligatory for not adhering to a vow to abandon a sin, and how is it to be rendered by one who cannot find any poor people? Is it permissible to render it from the parents' wealth? What is the ruling on the interruption of continuous fasting for expiation due to a legitimate excuse shortly before Ramadan?

Whoever makes a covenant with Allah to abandon a sin and then commits it, must offer an expiation for breaking an oath (kaffarat yameen): feeding ten poor persons, or clothing them, or freeing a slave. If unable, he must fast for three days. It is a condition for feeding that the food be of the middle kind (average quality). It is not permissible to resort to fasting unless one is unable to feed or clothe. One is considered unable if he does not find food beyond what suffices for himself and his dependents for the day and night, or if he is eligible to receive zakat. If it is possible to provide the expiation later, or if someone can lend it, the person is not considered unable. If there are no poor persons in the country, the expiation should be sent to another country where there are poor persons. Feeding the poor is done by giving each poor person one and a half kilograms of food, or cooked food sufficient for two meals. The consent of the parents is required if the expiation is from their money. In case of inability to feed and clothe, fasting for three days is sufficient, and it is not a condition for many scholars that these days be consecutive. According to the opinion that consecution is obligatory, the fast is not interrupted by the advent of Ramadan or menstruation; rather, the remaining days are completed after Eid or after menstruation ceases.