And Moses summoned all Israel and said to them, “Hear, O Israel, the statutes and the rules that I speak in your hearing today, and you shall learn them and be careful to do them. The Lord our God made a covenant with us in Horeb. Not with our fathers did the Lord make this covenant, but with us, who are all of us here alive today. The Lord spoke with you face to face at the mountain, out of the midst of the fire, while I stood between the Lord and you at that time, to declare to you the word of the Lord. For you were afraid because of the fire, and you did not go up into the mountain. He said:

“‘I am the Lord your God, who brought you out of the land of Egypt, out of the house of slavery.

...

“‘Observe the Sabbath day, to keep it holy, as the Lord your God commanded you. Six days you shall labor and do all your work, but the seventh day is a Sabbath to the Lord your God. On it you shall not do any work, you or your son or your daughter or your male servant or your female servant, or your ox or your donkey or any of your livestock, or the sojourner who is within your gates, that your male servant and your female servant may rest as well as you. You shall remember that you were a slave in the land of Egypt, and the Lord your God brought you out from there with a mighty hand and an outstretched arm. Therefore the Lord your God commanded you to keep the Sabbath day.

(Deuteronomy 5.1-6, 12-15)