I. The Name of the Lord is Holy

From The Catechism of the Catholic Church

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The second commandment prescribes respect for the Lord’s name. Like the first
commandment, it belongs to the virtue of religion and more particularly it
governs our use of speech in sacred matters.

PART THREE: LIFE IN CHRIST

SECTION TWO THE TEN COMMANDMENTS
- CHAPTER ONE YOU SHALL LOVE THE LORD YOUR GOD WITH ALL YOUR HEART, AND WITH ALL YOUR SOUL, AND WITH ALL YOUR MIND
  - Article 2 THE SECOND COMMANDMENT
    - I. The Name of the Lord is Holy

From The Catechism of the Catholic Church – rosary.team