ثم قال أيده الله تعالى:( ومن وطئ امرأته وهي حائض على علم بحالها أثم). قد ذكرنا ما ورد في حظر وطئ الحائض ومن فعل محظورا فقد أثم بلا خلاف. ثم قال:( وعليه ان يكفر ان كان وطؤه في أول الحيض بدينار قيمته عشرة دراهم فضة، وان كان في وسطه كفر بنصف دينار، وان كان في آخره كفر بربع دينار). فيدل عليه.
Then he, Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, said: "If a man knowingly has intercourse with his wife while she is menstruating, he has sinned." We have mentioned what has been narrated regarding the prohibition of intercourse with a menstruating woman, and whoever commits a prohibited act has sinned without any dispute. Then he, Shaykh (Al-Mufid), said: "And he must offer kaffarah (expiation). If the intercourse occurs during the beginning of menstruation, he must give a dinar equivalent to ten silver dirhams in value. If it occurs in the middle, he must expiate with half a dinar. If it is at the end of menstruation, he must expiate with a quarter of a dinar." This is supported by relevant evidence.