But if the husband or wife who isn’t a Christian is eager to leave, it is permitted. In such cases the Christian husband or wife should not insist that the other stay, for God wants his children to live in peace and harmony. For, after all, there is no assurance to you wives that your husbands will be converted if they stay; and the same may be said to you husbands concerning your wives. 1 Corinthians 7:15-16
The Christian should not be the one eager to leave. You should never marry a non-practicing Christian, however, if you were both lost and one got saved and then the unsaved person wants to leave because you are a Christian, God says you still can have peace and harmony.
The closer a husband and wife are to Jesus the more peace and harmony they have.
Prayer: “God, I thank You that You want Your children to live in peace and harmony! Give me the wisdom I need in my marriage or relationships to have the peace and harmony You want for us. In Jesus Name, Amen.”