Lessons # 70–72—The Seventh Commandment AA Shorter Catechism Q & A #70 (Memorize) Q. Which is the seventh commandment? A. The Seventh Commandment is, Thou shalt not commit adultery. Exodus 20:14 What does it mean? Adultery means to apostatize (to abandon; impurity: to pollute the moral law of God by thought and ...