"The Messenger of Allah said: 'Whoever has intercourse with a menstruating woman, or with a woman in her rear, or who goes to a fortuneteller and believes what he says, he has disbelieved in that which was revealed to Muhammad.'"
Sunan Ibn Majah Book 1, Hadith 373
← Previous Hadith He asked Umm Habibah, the wife of the Prophet: "What did you used to do with the Messenger of Allah when you were menstruating?" She said: "If it was at the beginning of the period when the bleeding is heavy, we would tie the waist-wrapper tightly around our thighs, then lie down with the Messenger of Allah."

Sunan Ibn Majah Book 1, Hadith 372 Next Hadith → The Prophet said concerning one who has intercourse with a woman when she is menstruating: "Let him give a Dinar or half a Dinar in charity."

Sunan Ibn Majah Book 1, Hadith 374