Exodus 20:8

Observe the Sabbath day, to keep it holy. Work six days and do everything you need to do. But the seventh day is a Sabbath to GOD, your God. Don’t do any work—not you, nor your son, nor your daughter, nor your servant, nor your maid, nor your animals, not even the foreign guest visiting in your town. For in six days GOD made Heaven, Earth, and sea, and everything in them; he rested on the seventh day. Therefore GOD blessed the Sabbath day; he set it apart as a holy day.

Exodus 20:8-11