If you walk in my statutes and observe my commandments and do them, then I will give you your rains in their season, and the land shall yield its increase, and the trees of the field shall yield their fruit. Your threshing shall last to the time of the grape harvest, and the grape harvest shall last to the time for sowing. And you shall eat your bread to the full and dwell in your land securely.

What is the fourth commandment? The fourth commandment is to remember the Sabbath to keep it holy. What does the fourth commandment teach us? To keep the Sabbath holy. What day is the Lord's day? The first of the week is called the Lord's day.