Marriage foundation plays a pivotal role, that is why Jesus states that a house built on a rock will never be shaken by whatever storm may come. Matthew 7:24-25.

If the foundation is made of sand, it will definitely be taken by the floods, storms, and other threats that come by. A strong foundation is in the Lord, our marriage will be firm. Sometimes people get attracted to unbelievers by fame, beauty, and even money itself. When challenges come, they cry to God. It was a wrong decision for Ahab to marry Jezebel, and for Solomon to have wives from different religious backgrounds.