It is a sign between me and the Israelites forever; for in six days ¹  the Lord made the heavens and the earth, and on the seventh day he rested and was refreshed.’” ² 

For six days you are to do your work, but on the seventh day you must cease, in order that your ox and your donkey may rest and that your female servant’s son and any hired help ¹  may refresh themselves. ²