Exodus 20:11
For in six days the Lord made the heavens and the earth, the sea and all that is in them, and rested on the seventh day; therefore the Lord blessed the sabbath day and made it holy.
Exodus 31:17
It is a sign between Me and the sons of Israel forever; for in six days the Lord made heaven and earth, but on the seventh day He ceased from labor, and was refreshed.
Jubilees 2:1
And the angel of the presence spake to Moses according to the word of the Lord, saying: Write the complete history of the creation, how in six days the Lord God finished all His works and all that He created, and kept Sabbath on the seventh day and hallowed it for all ages, and appointed it as a sign for all His works.