وَيَسۡـَٔلُونَكَ عَنِ ٱلۡمَحِيضِۖ قُلۡ هُوَ أَذٗى فَٱعۡتَزِلُواْ ٱلنِّسَآءَ فِي ٱلۡمَحِيضِ وَلَا تَقۡرَبُوهُنَّ حَتَّىٰ يَطۡهُرۡنَۖ فَإِذَا تَطَهَّرۡنَ فَأۡتُوهُنَّ مِنۡ حَيۡثُ أَمَرَكُمُ ٱللَّهُۚ إِنَّ ٱللَّهَ يُحِبُّ ٱلتَّوَّـٰبِينَ وَيُحِبُّ ٱلۡمُتَطَهِّرِينَ
They ask you concerning menstruation. Say: that is an Adha (a harmful thing for a husband to have a sexual intercourse with his wife while she is having her menses), therefore keep away from women during menses and go not unto them till they have purified (from menses and have taken a bath). And when they have purified themselves, then go in unto them as Allah has ordained for you (go in unto them in any manner as long as it is in their vagina). Truly, Allah loves those who turn unto Him in repentance and loves those who purify themselves (by taking a bath and cleaning and washing thoroughly their private parts, bodies, for their prayers, etc.).
نِسَآؤُكُمۡ حَرۡثٞ لَّكُمۡ فَأۡتُواْ حَرۡثَكُمۡ أَنَّىٰ شِئۡتُمۡۖ وَقَدِّمُواْ لِأَنفُسِكُمۡۚ وَٱتَّقُواْ ٱللَّهَ وَٱعۡلَمُوٓاْ أَنَّكُم مُّلَٰقُوهُۗ وَبَشِّرِ ٱلۡمُؤۡمِنِينَ
Your wives are a tilth for you, so go to your tilth when or how you will, and send (good deeds, or ask Allah to bestow upon you pious offspring) before you for your ownselves. And fear Allah, and know that you are to meet Him (in the Hereafter), and give good tidings to the believers (O Muhammad SAW).