The words of God to Moses underscore this reality: “You must observe my Sabbaths. This will be a sign between me and you for the generations to come, so you may know that I am the LORD, who makes you holy” (Exod. 31:12–13). The Sabbath was not merely a day. The Sabbath was a sign to everyone—for generations to come—a “perpetual witness of the covenant between God and Israel.”5
