if one does not have the means then he should fast for two months continuously before he has physical contact but any one who is unable to do so should feed sixty needy persons. this so that you may be faithful to god and his apostle. these are the limits set by god. as for the unbelievers there is painful punishment for them.
فمن لم يجد فصيام شهرين متتابعين من قبل أن يتماسا فمن لم يستطع فإطعام ستين مسكينا ذلك لتؤمنوا بالله ورسوله وتلك حدود الله وللكافرين عذاب أليم