Certainly no one wants to get snared by a gold digger or cheater.
If someone is already at the stage of marriage, I would hope there is an established amount of love by that point. If there is love, and the two are Christians, then the relationship is hopefully growing into a phase of deepening that love through a married covenant with one another and God. There is a reason people should really understand the weight of biblical covenants, but also a deeper understanding of bible verses on love and forgiveness. Forgiveness? Yes, because there will be times where couples have to learn to forgive one another, as honesty and forgiveness are very important for relationships that are built on love and grace. In a relationship, both sides could become guilty of being unfriendly over one thing or another, and there could be difficult consequences by actions on both sides, the one who did the hurting, but also the other by how they react and respond. But, the bible gives us verses of how we humans are to uphold love, and love covers a multitude of sins (or wrong doings). So, if a relationship is based on genuine love, then true love will prevail and a couple will overcome their trials.
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Here are some bible verses, but I do recommend couples deep dive into more verses on love and forgiveness to help with their relationship's foundations.
1 Peter 4:8
John 13:34-35
1 Corinthians 13:2-7
Matthew 6:14-15
Colossians 3:13
If there isn't a good foundation to a couple's relationship, then they might want to focus on what it means to live their lives with God at the forefront of everything.