Al-Baqarah 2:221 ولا تنكحوا المشركات حتى يومن ولامة مومنة خير من مشركة ولو اعجبتكم ولا تنكحوا المشركين حتى يومنوا ولعبد مومن خير من مشرك ولو اعجبكم اولايك يدعون الى النار والله يدعو الى الجنة والمغفرة باذنه ويبين اياته للناس لعلهم يتذكرون ٢٢١

Do not marry the polytheist women, unless they come to believe (in Islam); a Muslim slave-girl is better than a polytheist woman, even though she may attract you; and do not give (your women) in marriage to polytheist men, unless they come to believe; a Muslim slave is better than a polytheist, even though he may attract you. They invite to the Fire when Allah invites, by His will, to Paradise, and to forgiveness. He makes His verses clear to the people, so that they may heed the advice.