Ezekiel 20:12 - Clarke's commentary and critical notes on the Bible

Moreover also I gave them my sabbaths, to be a sign between me and them, that they might know that I am the LORD that sanctify them. I gave them my Sabbaths - The religious observance of the Sabbath was the first statute or command of God to men. This institution was a sign between God and them, to keep them in remembrance of the creation of the world, of the rest that he designed them in Canaan, and of the eternal inheritance among the saints in light. Of these things the Sabbath was a type and pledge.