"During the time a woman is menstruating, it is preferable for a man to avoid coitus, even if it does not involve full penetration- that is, as far as the circumcision ring ­and even if it does not involve ejaculation. It is also highly inadvisable for him to sodomize her during this time.

If the number of days of the woman's menstrual period is divided by three, a husband who has intercourse with her during the first two days must pay equivalent of 18 nokhods (each nokhod is about 3 grams) of gold to the poor; if he has it on the third or fourth days the equivalent of 9 nokhods; and if he has it during the last two days, the equivalent of 41/2 nokhods. Sodomizing a menstruating woman does not require such payment.

If a man has intercourse with his wife during all three of these periods, he must pay the equivalent of 31/2 nokhods in gold to the poor. If the price of gold has changed between the time of coitus and the time of payment, the rate in effect on the day of payment will prevail.

If during an act of intercourse a man notices that the woman has begun menstruating, he must withdraw, if he fails to, he must give alms to the poor.

If such a man cannot afford to give alms to the poor, he must at least give something to a beggar. If he cannot afford that either, he must ask forgiveness of God.

After a wife's menstrual period, her husband may repudiate her, even if she has not yet made her ablutions. He may also indulge in relations with her, but it is preferable that he wait until she has made her ablutions. In the interim, the woman is not authorized to do anything which is forbidden to her during menstruation, such as going into a mosque or touching the writings of the Koran, until she has completed her ablutions."

Notes: It seems it is a lot better if the couple have sex during the entire menstrual period. It would cost 31/2 nokhods rather than 18 nokhods if happens in the first two days. It also says that a man should not sodomize his wife only during this period. However, if he does, no alms is required.