Deuteronomy 5:14-15

14but the seventh day is a Sabbath to the Lord your God. Do not do any work — you, your son or daughter, your male or female slave, your ox or donkey, any of your livestock, or the resident alien who lives within your city gates, so that your male and female slaves may rest as you do.

15Remember that you were a slave in the land of Egypt, and the Lord your God brought you out of there with a strong hand and an outstretched arm. That is why the Lord your God has commanded you to keep the Sabbath day.