Narrated Abdullah ibn Abbas:

The Prophet ﷺ said about a person who had intercourse with his wife while she was menstruating: He must give one dinar or half a dinar in alms.

Abu Dawud said: The correct version says si: One dinar or half a dinar. Shu'bah (a narrator) did not sometimes narrate this tradition as a statement of the Prophet ﷺ.

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ شُعْبَةَ، حَدَّثَنِي الْحَكَمُ، عَنْ عَبْدِ الْحَمِيدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ مِقْسَمٍ، عَنِ ابْنِ عَبَّاسٍ، عَنِ النَّبِيِّ ﷺ فِي الَّذِي يَأْتِي امْرَأَتَهُ وَهِيَ حَائِضٌ قَالَ " يَتَصَدَّقُ بِدِينَارٍ أَوْ نِصْفِ دِينَارٍ " . قَالَ أَبُو دَاوُدَ هَكَذَا الرِّوَايَةُ الصَّحِيحَةُ قَالَ " دِينَارٌ أَوْ نِصْفُ دِينَارٍ " . وَرُبَّمَا لَمْ يَرْفَعْهُ شُعْبَةُ .