He wants to give up smoking; can he swear an oath concerning himself?

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He offered kafaarat yameen in the form of cash; does he have to offer it again?
Which takes precedence: making up missed Ramadan fasts or fasting in expiation for breaking an oath or fulfilment of a vow?

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He offered kafaarat yameen in the form of cash; does he have to offer it again?
Which takes precedence: making up missed Ramadan fasts or fasting in expiation for breaking an oath or fulfilment of a vow?

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