Koran Morality on Marriage:
Quran 2:221
“Do not marry idolatresses until they believe, for indeed, a believing slave woman is better than an idolatress, even though she pleases you. And do not give your daughters in marriage to idolaters until they believe, for indeed, a believing slave is better than an idolater, even though he pleases you. These people invite you to the fire, and Allah invites you to the garden, and to forgiveness by his grace, and explains his signs to mankind so that perhaps they will remember.”