What does the fourth commandment. Forbid?

The Fourth Commandment, which instructs to "remember the Sabbath day, to keep it holy," primarily forbids working on the Sabbath, which is traditionally observed on the seventh day of the week (Saturday for Jews and Sunday for Christians). It emphasizes rest and devotion, prohibiting activities that distract from worship and spiritual reflection. Additionally, it encourages honoring one's parents and maintaining family relationships, underscoring the importance of rest and familial respect in one's life.