حَدَّثَنِي يَحْيَى ، عَنْ مَالِك ، عَنْ
زَيْدِ بْنِ أَسْلَمَ ، أَنَّ رَجُلًا سَأَلَ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، فَقَالَ : مَا يَحِلُّ لِي مِنَ امْرَأَتِي وَهِيَ حَائِضٌ ؟ فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ :
" لِتَشُدَّ عَلَيْهَا إِزَارَهَا ثُمَّ شَأْنَكَ بِأَعْلَاهَا "
It is narrated from Sayyiduna Zaid bin Aslam (may Allah be pleased with him) that a man asked the Messenger of Allah (peace and blessings be upon him), "Is it permissible for me to approach my wife when she is menstruating?" The Messenger of Allah (peace and blessings be upon him) replied: "Tie a waist-wrapper on her, then you have permission for what is above the waist-wrapper."
Related hadith on this topic