2 Corinthians 6:14-15
z Do not be unequally yoked with unbelievers. For a what partnership has righteousness with lawlessness? Or b what fellowship has light with darkness?
c What accord has Christ with Belial? Or what portion does a believer share with an unbeliever?
English Standard Version (ESV) The Holy Bible, English Standard Version Copyright © 2001 by Crossway Bibles, a division of Good News Publishers.
You shall not intermarry with them, giving your daughters to their sons or taking their daughters for your sons.
For if you turn back and cling to the remnant of these nations remaining among you and make marriages with them, so that you associate with them and they with you.
For they have taken some of their daughters to be wives for themselves and for their sons, so that the holy race has mixed itself with the peoples of the lands. And in this faithlessness the hand of the officials and chief men has been foremost.
And I confronted them and cursed them and beat some of them and pulled out their hair. And I made them take oath in the name of God, saying, "You shall not give your daughters to their sons, or take their daughters for your sons or for yourselves.
1 Corinthians 7:39
A wife is bound to her husband as long as he lives. But if her husband dies, she is free to be married to whom she wishes, only in the Lord.
Therefore do not become partners with them.
Take no part in the unfruitful works of darkness, but instead expose them.
1 John 1:6
If we say we have fellowship with him while we walk in darkness, we lie and do not practice the truth.
To open their eyes, so that they may turn from darkness to light and from the power of Satan to God, that they may receive forgiveness of sins and a place among those who are sanctified by faith in me.
1 Corinthians 10:21
You cannot drink the cup of the Lord and the cup of demons. You cannot partake of the table of the Lord and the table of demons.