Jami' at-Tirmidhi

Jami` at-Tirmidhi 136

What Has Been Related About The Atonement For That
Arabic hadith text
حَدَّثَنَا عَلِيُّ بْنُ حُجْرٍ، أَخْبَرَنَا شَرِيكٌ، عَنْ خُصَيْفٍ، عَنْ مِقْسَمٍ، عَنِ ابْنِ عَبَّاسٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم فِي الرَّجُلِ يَقَعُ عَلَى امْرَأَتِهِ وَهِيَ حَائِضٌ قَالَ ‏"‏ يَتَصَدَّقُ بِنِصْفِ دِينَارٍ ‏"
Translation
Ibn Abbas narrated that

the Prophet said about a man who had sexual intercourse with his wife while she is menstruating: "He should give half a Dinar in charity."