(48) باب فِي كَفَّارَةِ مَنْ أَتَى حَائِضًا
Narrated Abdullah ibn Abbas:
If a man has sexual intercourse (with menstruating woman) during her bleeding, he should give one dinar as sadaqah, and if he does so when bleeding has stopped, he should give half a dinar as sadaqah.
Reference: Sunan Abi Dawud 2169
In-book reference: Book 12, Hadith 124
English translation: Book 11, Hadith 2164