Surah No. 2, Al Baqr, Ayat No. 222
وَيَسْأَلُونَكَ عَنِ الْمَحِيضِ قُلْ هُوَ أَذًى فَاعْتَزِلُوا النِّسَاءَ فِي الْمَحِيضِ وَلَا
تَقْرَبُوهُنَّ حَتَّىٰ يَطْهُرْنَ فَإِذَا تَطَهَّرْنَ فَأْتُوهُنَّ مِنْ حَيْثُ أَمَرَكُمُ اللَّهُ
o إِنَّ اللَّهَ يُحِبُّ التَّوَّابِينَ وَيُحِبُّ الْمُتَطَهِّرِينَ
They ask you concerning women's monthly courses. Say: It is an illness and impure condition for a woman.So keep away from women in that condition, and do not approach them till they are clean. But when they have purified themselves, you may approach them in a manner commanded by Allah. Truely Allah loves those who turn to Him constantly and who have a care for cleanness.
According to the religious scholars, words of "do not approach " means, the husbands should not go near to the wives when they are in the period of menstruating for their personal needs. On the other hand, movements of such women should not be restricted with regard to cooking or sitting and eating along with all the members of the family.