عَن زيد بن أسلم قَالَ
أَنَّ رَجُلًا سَأَلَ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ: مَا يَحِلُّ لِي مِنَ امْرَأَتِي وَهِيَ حَائِضٌ؟ فَقَالَ لَهُ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «تَشُدُّ عَلَيْهَا إِزَارَهَا ثُمَّ شَأْنُكَ بِأَعْلَاهَا»
A man asked God’s messenger what was lawful for him in his wife when she was menstruating, and he replied, “She should tie her waist-wrapper on her, then you can do what you like above it.”