IV. Offenses Against the Dignity of Marriage

From The Catechism of the Catholic Church

2384
Divorce is a grave offense against the natural law. It claims to break the
contract, to which the spouses freely consented, to live with each other till
death. Divorce does injury to the covenant of salvation, of which sacramental
marriage is the sign. Contracting a new union, even if it is recognized by
civil law, adds to the gravity of the rupture: the remarried spouse is then in
a situation of public and permanent adultery:

PART THREE: LIFE IN CHRIST

SECTION TWO THE TEN COMMANDMENTS
- CHAPTER TWO YOU SHALL LOVE YOUR NEIGHBOR AS YOURSELF
  - Article 6 THE SIXTH COMMANDMENT
    - IV. Offenses Against the Dignity of Marriage

From The Catechism of the Catholic Church – rosary.team