3Six 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 (Leviticus 23:3).
The book of Leviticus, the third book of the Pentateuch, describes in detail the ordinances and commands of the Lord. The Creator God is a God of infinite detail. Inherent in the detail, is the idea of purpose and design. There is nothing beyond the notice of our Creator. The idea or command for a sabbath has a purpose. During the creation week God rested from His work on the seventh day, not because he couldn't work any longer, but so we would learn to rest in Him. There is something in the verse above that should not be missed, the Sabbath rest is holy. So the purpose of the Sabbath is to rest in the Lord who is holy. The Creator God is the Sabbath's days rest. The God of detail calls you to rest; rest in Him.