If a person breaks his oath, what is the penalty?

Answer

If a person takes an oath that he will perform an act (e.g. that he will fast) or will refrain from doing an act (e.g. that he will not smoke), but does not intentionally act according to his oath, he should give Kaffarah for it, he should fully feed ten indigent persons 750 grams of food stuffs (wheat or bread or rice), or should provide them with clothes.