2. Al-Baqara (The Cow)

Surah: 2   Aya: 223

223. Nisaokum harthun lakum fa/too harthakum anna shi/tum waqaddimoo li-anfusikum waittaqoo Allaha waiAAlamoo annakum mulaqoohu wabashshiri almu/mineena
  

  Translation

223. Your wives are a tilth for you, so go to your tilth (have sexual relations with your wives in any manner as long as it is in the vagina and not in the anus), when or how you will, and send (good deeds, or ask Allâh to bestow upon you pious offspring) before you for your ownselves. And fear Allâh, and know that you are to meet Him (in the Hereafter), and give good tidings to the believers (O Muhammad SAW).