Genesis 2:3
"And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made."
Cross References (ranked by relevance)
And he said unto them, The sabbath was made for man, and not man for the sabbath:
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.
Six days shall work be done: but the seventh day is the sabbath of rest, an holy convocation; ye shall do no work therein: it is the sabbath of the LORD in all your dwellings.
And they returned, and prepared spices and ointments; and rested the sabbath day according to the commandment.
Six days thou shalt work, but on the seventh day thou shalt rest: in earing time and in harvest thou shalt rest.
Six days thou shalt do thy work, and on the seventh day thou shalt rest: that thine ox and thine ass may rest, and the son of thy handmaid, and the stranger, may be refreshed.
And madest known unto them thy holy sabbath, and commandedst them precepts, statutes, and laws, by the hand of Moses thy servant:
The blessing of the LORD, it maketh rich, and he addeth no sorrow with it.