The Bible does not give a specific Scripture about the question, but the Scriptures are clear about what type of spouse a Christian should marry.
The Bible warns against being unequally yoked in 2 Corinthians 6:14: “Do not be yoked together with unbelievers. For what do righteousness and wickedness have in common? Or what fellowship can light have with darkness?” (NIV).
God gives us this command for our own protection and joy. He knows that we can’t have the best possible marriage if we have different beliefs, values, and priorities from our spouse. And even though obedience to God can be difficult, it’s always worth it.
Some Christians may find themselves saying, “But this person will change.” Maybe so. God has the power to change someone, and we should never give up on praying for those we care about. But the verse in 2 Corinthians doesn’t say, “Do not be unequally yoked … unless you think the person will change.” It says, “Do not be yoked together with unbelievers” (emphasis added).
This issue was even a concern in the Old Testament. When God was leading the Israelites into the Promised Land, He gave them strong commands about how they should deal with the pagan nations. Deuteronomy 7:3-6 says:
Do not intermarry with them. Do not give your daughters to their sons or take their daughters for your sons, for they will turn your sons away from following me to serve other gods, and the LORD's anger will burn against you and will quickly destroy you…… For you are a people holy to the LORD your God. The LORD your God has chosen you out of all the peoples on the face of the earth to be his people, his treasured possession.
If you are a follower of Christ, you are a chosen child of God. He doesn’t want you to settle for less than His very best.
