Commentaries:
Jamieson, Fausset, and Brown
that thy man-servant and thy maid-servant may rest as well as thou—This is a different reason for the observance of the Sabbath from what is assigned in Exodus 20:8-11, where that day is stated to be an appointed memorial of the creation. But the addition of another motive for the observance does not imply any necessary contrariety to the other; and it has been thought probable that, the commemorative design of the institution being well known, the other reason was specially mentioned on this repetition of the law, to secure the privilege of sabbatic rest to servants, of which, in some Hebrew families, they had been deprived. In this view, the allusion to the period of Egyptian bondage (Deuteronomy 5:15), when they themselves were not permitted to observe the Sabbath either as a day of rest or of public devotion, was peculiarly seasonable and significant, well fitted to come home to their business and bosoms.
I am the Lord thy God—The word "Lord" is expressive of authority or dominion; and God, who by natural claim as well as by covenant relation was entitled to exercise supremacy over His people Israel, had a sovereign right to establish laws for their government. [See on Exodus 20:2.] The commandments which follow are, with a few slight verbal alterations, the same as formerly recorded (Exo. 20:1-17), and in some of them there is a distinct reference to that promulgation.
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