Exodus 20:9-11

Work and get everything done during six days each week, but the seventh day is a day of rest to honor the LORD your God. On that day no one may do any work: not you, your son or daughter, your male or female slaves, your animals, or the foreigners living in your cities. The reason is that in six days the LORD made everything—the sky, the earth, the sea, and everything in them. On the seventh day he rested. So the LORD blessed the Sabbath day and made it holy.