Matthew 19:6 KJV
[6] Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
https://bible.com/bible/1/mat.19.6.KJV
How do we apply "what God has joined together "? Do not the saints have the liberty to marry whoever they will as long as in the Lord?
My main question I have for posting this verse is, it's obvious a marriage birthed from adultery wouldn't fall under "what God has joined together " and wouldn't be honorable before God. At what point does it become honorable before him?
If a couple falls out of church from adultery then marry in their 20s start a family then want to be restored 15 years later is the marriage still sinful and they must separate? Some claim they can stay together so to not tare the family apart, but at what point would the marriage fall under "what God has put together "?