وَعَنِ ابْنِ عَبَّاسٍ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا وَقَعَ الرَّجُلُ بِأَهْلِهِ وَهِيَ حَائِضٌ فَلْيَتَصَدَّقْ بِنِصْفِ دِينَارٍ»
Ibn Abbas reported God’s messenger as saying, “When a man has intercourse with his wife while she is menstruating, he must give half a dinar in alms.” Tirmidhi, Abu Dawud, Nasai.