What does the Bible say about God's instructions for marriage?

In Genesis 28, Isaac instructed Jacob not to marry a daughter of Canaan due to the troubles that such a union brought. This is a reflection of God's broader instruction that believers are not to be unequally yoked with unbelievers, as noted in 2 Corinthians 6:14. This command is not merely about social norms but is deeply rooted in the spiritual integrity of the family unit, as the marriage relationship is meant to mirror the relationship of Christ and His Church. Thus, it's imperative for believers to seek partners who share their faith, as doing otherwise may bring strife and distract from their spiritual walk.