15 You shall remember that you were a servant in the land of Egypt, and Yahweh your God brought you out of there by a mighty hand and by an outstretched arm: therefore Yahweh your God commanded you to keep the Sabbath day.
*Minor differences ignored. Grouped by changes, with first version listed as example.
And remember that thou wast a servant - In this and the latter clause of the preceding verse Moses adds another reason why one day in seven should be sanctified, viz., that the servants might rest, and this is urged upon them on the consideration of their having been servants in the land of Egypt. We see therefore that God had three grand ends in view by appointing a Sabbath.
1. To commemorate the creation.
2. To give a due proportion of rest to man and beast. When in Egypt they had no rest; their cruel task-masters caused them to labor without intermission; now God had given rest, and as he had showed them mercy, he teaches them to show mercy to their servants: Remember that thou wast a servant.
3. To afford peculiar spiritual advantages to the soul, that it might be kept in remembrance of the rest which remains at the right hand of God.
Therefore the Lord thy God commanded thee to keep the Sabbath day - Here is a variation in the manner of expression, Sabbath day for seventh, owing, it is supposed, to a change of the day at the exodus from Sunday to Saturday, effected upon the gathering of the manna, Exodus 16:23. The Sabbath now became a twofold memorial of the deliverance, as well as of the creation; and this accounts for the new reason assigned for its observance: "Therefore the Lord thy God commanded thee to keep the Sabbath day." See Dr. A. Bayley's Hebr. and Eng. Bible, and see the note on Exodus 16:23.
And remember that thou wast a servant in the land of Egypt,.... Even a bondservant; for Egypt was an house of bondage, and there the Israelites were made to serve in hard bondage; of which they are reminded, that their hearts might be touched with it, and inclined to show pity to persons in somewhat similar circumstances; calling to mind how sweet a little rest would have been unto them when in Egypt:
and that the Lord thy God brought thee out thence, through a mighty hand and by a stretched out arm; signifying that their deliverance from their state of bondage was not owing to themselves, nor to any creature, but to the mercy and kindness of God, and to his almighty power; and therefore they were under the greatest obligations to observe any command and institution of his he should think fit to make; and particularly this of the sabbath, which was made on that account, as follows:
wherefore the Lord thy God commandeth thee to keep the sabbath day; in commemoration of their rest from Egyptian bondage.
*More commentary available at chapter level.