For in six days Yahuah made the heavens and earth, the sea, and all that in them is, and rested the seventh day... Shemoth (Exodus) 20:11

Verily my sabbaths ye shall keep: for it is a sign between me and you throughout your generations; that ye may know that I am the Lord...

Wherefore the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations, for a perpetual covenant.