NET
12 I also gave them my Sabbaths as a reminder of our relationship, so that they would know that I, the Lord, sanctify them.
Darby
12 And I also gave them my sabbaths, to be a sign between me and them, that they might know that I [am] Jehovah that hallow them.
KJV
12 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.