Chapter on the Rules of Menstruation, Istihadah, and Nifas, and Purification From Them

Muhammad ibn Ahmad ibn Yahya narrated from some of our companions, from Al-Tayalisi, from Ahmad ibn Muhammad, from Dawood ibn Farqad, from Abu Abdullah عليه السلام, who said: Imam عليه السلام said regarding the expiation (kaffarah) for intercourse during menstruation: “If it occurs at the beginning of menstruation, he must give charity of one dinar; If in the middle, half a dinar; And if at the end, a quarter of a dinar." I said: "What if he does not have the means to give the expiation?" Imam عليه السلام said: "Then let him give charity to one needy person, and if he cannot, then let him seek Allah’s forgiveness and not repeat it. For seeking forgiveness is repentance and serves as expiation for anyone who cannot afford any part of the prescribed expiation."