NET
20 Treat my Sabbaths as holy and they will be a reminder of our relationship, and then you will know that I am the Lord your God.”
Darby
20 and hallow my sabbaths; and they shall be a sign between me and you, that ye may know that I [am] Jehovah your God.
KJV
20 And hallow my sabbaths; and they shall be a sign between me and you, that ye may know that I [am] the LORD your God.