As with the other commandments, the 5th (or 4th, depending on the source/religion) commandment is somewhat longer in its entirety.
"Honor thy father and thy mother, so that you may live long in the land the Lord your God is giving you." - Exodus 20:12
Originally, the honoring of ones parents was the equivalent of honoring God, and striking or cursing ones parents was punishable by death. In The New Testament, the commandment is stated in a softer tone, saying that disobedience to parents is a big sin. And Jesus reaffirms that the honoring of the Lord is far more important than the honoring of ones parents.