Which of the Ten Commandments does Paul not repeat in his letters?
Paul repeats nine of the Ten Commandments in his letters, but he does not repeat the commandment concerning the Sabbath. The Sabbath is the single commandment from the Ten that Paul omits, while the other nine are repeated in his epistles.
Les explains that since believers are under Grace and not under Law, love is the dominant force and the fulfilling of the Law. In Romans 13, Paul lists commands such as do not commit adultery, do not kill, do not bear false witness, do not covet, and love your neighbor as yourself, which come from the Ten Commandments. Les notes that in Ephesians Paul uses the one concerning children—obey your parents, the first commandment with promise. Yet even though Paul repeats nine of the Ten Commandments, the one he does not repeat is the Sabbath.