Is expiation obligatory for one who swore many false oaths and then repented for them, and if so, for how many days must one fast? And what is the authenticity of the hadith which indicates that whoever swears by Allah falsely will enter Hell? And what is the jurisprudential ruling on fulfilling a promise of friendship to a person who has disappeared, and is failure to fulfill it considered hypocrisy?

The expiation for a false (perjury) oath is sincere repentance to Allah Almighty, by abandoning the sin, regretting it, and resolving not to return to it. This is the view of the majority of scholars. Some scholars held that an expiation for an oath is obligatory in addition to repentance, which is feeding ten poor persons, or clothing them, or freeing a slave. If one cannot find these, then fasting for three days. The fasting should be observed after being unable to perform the preceding options.

The false oath is a major sin and a cause for Allah's wrath, as the Prophet, peace and blessings be upon him, said: "There are three (types of people) whom Allah will not speak to, or look at, or purify on the Day of Resurrection, and for them is a painful torment: the one who lets his garment hang below his ankles out of arrogance, the one who reminds people of his favors, and the one who sells his merchandise by taking a false oath." Repentance erases what came before it, and "the one who repents from sin is like one who has no sin."

Fulfilling a promise to a friend is recommended, and nothing is incurred by breaking it.