ما هي كفارة الجماع أثناء الحيض، وما الذي يلزم الزوج في هذه الحالة؟

Intercourse during menstruation, if done intentionally, is forbidden and necessitates expiation (kaffarah). This includes the man inserting his glans into the woman's vagina. As for a man enjoying his wife between the navel and the knee during menstruation, there is a difference of opinion on this, and it becomes forbidden if there is a fear of falling into the forbidden. If penetration occurs unintentionally and the penis is withdrawn immediately, there is no sin or expiation upon the couple.