Ezekiel 20:20

20 Keep My Sabbaths holy, and they will be a sign between Me and you, so you may know that I am the Lord your God.

Ezekiel 20:20 In-Context

18 "Then I said to their children in the wilderness: Don't follow the statutes of your fathers, defile yourselves with their idols, or keep their ordinances.
19 I am the Lord your God. Follow My statutes, keep My ordinances, and practice them.
20 Keep My Sabbaths holy, and they will be a sign between Me and you, so you may know that I am the Lord your God.
21 "But the children rebelled against Me. They did not follow My statutes or carefully keep My ordinances-the person who does them will live by them. They also profaned My Sabbaths. So I considered pouring out My wrath on them and exhausting My anger against them in the wilderness.
22 But I withheld My hand and acted because of My name, so that it would not be profaned in the eyes of the nations in whose sight I brought them out.
Holman Christian Standard Bible ® Copyright © 2003, 2002, 2000, 1999 by Holman Bible Publishers.  Used by permission.  All rights reserved.