Divorce and Remarriage
Some marriages cannot live up to God's ideal of a permanent, loving marriage. Because humans are not perfect, God included provision for divorce in the Mosaic Law. In Matthew 5:18 and Luke 16:17, Jesus said that the Law was still in place. Not "...one jot or one tittle shall...pass from the law..."
Jesus concludes his speech with a repeat of Matthew 5:31-32. Again, there is no problem for a person who divorces and remains single.
However, a man who divorces his wife and marries another woman commits adultery.
If his wife marries again, her new husband also commits adultery.
However, no adultery results if the first spouse had been guilty of fornication.