Leviticus 19:3 Lev. 19:3
Ye shall fear every man his mother, and his father, and keep my sabbaths: I am the LORD your God.
Ezekiel 20:12 Ezek. 20:12
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.
(Relation)