12 Also I gave them my Sabbaths as a sign between us, so they would know that I the LORD made them holy.

Read Ezekiel 20:12 Using Other Translations

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.
Moreover, I gave them my Sabbaths, as a sign between me and them, that they might know that I am the LORD who sanctifies them.
And I gave them my Sabbath days of rest as a sign between them and me. It was to remind them that I am the LORD, who had set them apart to be holy.