Translation
(12) Marriage (Kitab Al-Nikah)
كتاب النكاح
(714) Chapter: Regarding The Penalty For The One Who Approaches His Wife While She Is Menstruating
(48) باب فِي كَفَّارَةِ مَنْ أَتَى حَائِضًا
Sunan Abi Dawud 2169 

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.

حَدَّثَنَا عَبْدُ السَّلاَمِ بْنُ مُطَهَّرٍ، حَدَّثَنَا جَعْفَرٌ، - يَعْنِي ابْنَ سُلَيْمَانَ - عَنْ عَلِيِّ بْنِ الْحَكَمِ الْبُنَانِيِّ، عَنْ أَبِي الْحَسَنِ الْجَزَرِيِّ، عَنْ مِقْسَمٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ إِذَا أَصَابَهَا فِي الدَّمِ فَدِينَارٌ وَإِذَا أَصَابَهَا فِي انْقِطَاعِ الدَّمِ فَنِصْفُ دِينَارٍ ‏.‏
Grade :  Sahih Mauquf (Al-Albani) صحيح موقوف  (الألباني)حكم :
Reference : Sunan Abi Dawud 2169
In-book reference : Book 12, Hadith 124
English translation : Book 11, Hadith 2164