Bible Verses About The Sabbath: Grounds of its institution

On the seventh day God finished his work which he had done; and he rested on the seventh day from all his work which he had done.

God blessed the seventh day, and made it holy, because he rested in it from all his work of creation which he had done.

for in six days the LORD made heaven and earth, the sea, and all that is in them, and rested the seventh day; therefore the LORD blessed the Sabbath day, and made it holy.