Parents and Children - "Honor your father and mother." (Exodus 20:12)
The Ten Commandments are probably the most well-known part of the Torah, and along with the prohibitions against murder and theft, the commandment to honor one's parents is probably the most well remembered of the Ten. As a child, I thought that this commandment was addressed to young children and their parents and that it required me to obey my parents - and my parents did not disabuse me of that interpretation!