What is the expiation for one who swore not to do something and then did it: feeding ten needy people or fasting three days, and what is the ruling on postponing the fasting for the expiation of an oath until after Ramadan?

If someone swears an oath not to do something and then does it, they have broken their oath, and an expiation for the oath becomes obligatory upon them. If they are unable to feed, clothe, or free a slave, they must fast three days with the intention of expiation. The fasting of Ramadan does not suffice for this expiation. If it is impossible to fast for expiation before Ramadan, or if the breaking of the oath occurs during Ramadan, then it is necessary to delay. Scholars have differed on the permissibility of delaying the expiation for an oath if it is possible to fast for it before Ramadan. The most preponderant opinion is that if the reason for breaking the oath was a sin, the expiation is immediately obligatory. Otherwise, it is recommended to hasten with it to clear one's conscience.