Menstruation is harmful to a woman, so the husband should not have any sexual activity with his menstruating wife until the menstrual period is over and she cleanses and purifies herself.
(They ask you ˹O Prophet˺ about menstruation. Say, “Beware of its harm! So keep away, and do not have intercourse with your wives during their monthly cycles until they are purified. When they purify themselves, then you may approach them in the manner specified by Allah. Surely Allah loves those who always turn to Him in repentance and those who purify themselves.”) Al-Baqara 2:222
الحيض فيه ضرر على المرأة لذا يجب على الزوج أن لا يقرب زوجته الحائض إلى أن تنتهي فترة الحيض و تغتسل (تتطهر). ( وَيَسْأَلُونَكَ عَنِ الْمَحِيضِ قُلْ هُوَ أَذًى فَاعْتَزِلُوا النِّسَاءَ فِي الْمَحِيضِ وَلَا تَقْرَبُوهُنَّ حَتَّىٰ يَطْهُرْنَ فَإِذَا تَطَهَّرْنَ فَأْتُوهُنَّ مِنْ حَيْثُ أَمَرَكُمُ اللَّـهُ إِنَّ اللَّـهَ يُحِبُّ التَّوَّابِينَ وَيُحِبُّ الْمُتَطَهِّرِينَ ) ﴿البقرة: ٢٢٢﴾