What does the Bible say about divorce and marriage?

In Mark 10:1-12, Jesus underscores the sacredness of marriage by referencing the creation account, stating that God made them male and female and designed marriage as a permanent union. He emphasizes that divorce, while permitted by Moses due to the hardness of men's hearts, was never part of God’s original intention for marriage. Thus, any divorce not based on the cause of unfaithfulness leads to adultery, as the sacred bond is not truly dissolved in God’s eyes. It reveals the depths of human sinfulness that necessitated such a concession.