Deuteronomy 5:15

15 Remember that you were slaves in Egypt and that the LORD your God brought you out of there with a mighty hand and an outstretched arm. Therefore the LORD your God has commanded you to observe the Sabbath day.

Read Deuteronomy 5:15 Using Other Translations

And remember that thou wast a servant in the land of Egypt, and that the LORD thy God brought thee out thence through a mighty hand and by a stretched out arm: therefore the LORD thy God commanded thee to keep the sabbath day.
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.
Remember that you were once slaves in Egypt, but the LORD your God brought you out with his strong hand and powerful arm. That is why the LORD your God has commanded you to rest on the Sabbath day.