We just learned about the Third Commandment to keep the Sabbath Holy.
The fourth commandment that God gave to Moses is:
Thou shalt honor thy father and thy mother that it may be well with thee and thou mayest live long upon the earth.
This means to listen to your parents, be good to them, and don't disobey them.
(from: wikisource - Luther's Small Catechism)
(from: wikipedia - honour thy father and thy mother)
