Al Baqarah Ayah 222

وَيَسْــَٔلُونَكَ عَنِ ٱلْمَحِيضِ‌ۖ قُلْ هُوَ أَذًى فَٱعْتَزِلُواْ ٱلنِّسَآءَ فِى ٱلْمَحِيضِ‌ۖ وَلَا تَقْرَبُوهُنَّ حَتَّىٰ يَطْهُرْنَ‌ۖ فَإِذَا تَطَهَّرْنَ فَأْتُوهُنَّ مِنْ حَيْثُ أَمَرَكُمُ ٱللَّهُ‌ۚ إِنَّ ٱللَّهَ يُحِبُّ ٱلتَّوَّٲبِينَ وَيُحِبُّ ٱلْمُتَطَهِّرِينَ ٢٢٢ 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.”