In Exodus 20:8-10, Deuteronomy 5:12-13, in the spiritual meaning, the third commandment refers to our being reformed and regenerated by the Lord. The six days of labor mean battling against the flesh and its cravings and also against the evils and falsities that are in us from hell. The seventh day means our becoming connected to the Lord and our being regenerated as a result. (True Christian Religion 302)