He is the one who created you from a single soul and made from it its mate that he may attain calm unto her. ( Al-A'raaf: 189 )
And among His Signs is this, that He created for you mates from among yourselves, that ye may dwell in tranquility with them, and He has put love and mercy between your (hearts): verily in that are Signs for those who reflect. [Qur'an 30:21]