Exodus 20:8

The Fourth Word, "Remember the Sabbath-day, to keep it holy," presupposes an acquaintance with the Sabbath, as the expression "remember" is sufficient to show, but not that the Sabbath had been kept before this. From the history of the creation that had been handed down, Israel must have known, that after God had created the world in six days He rested the seventh day, and by His resting sanctified the day (Gen 2:3). But hitherto there had been no commandment given to man to sanctify the day. This was given for the first time to Israel at Sinai, after preparation had been made for it by the fact that the manna did not fall on the seventh day of the week (Exo 16:22). Here therefore the mode of sanctifying it was established for the first time. The seventh day was to be שׁבּי (a festival-keeper, see Exo 16:23), i.e., a day of rest belonging to the Lord, and to be consecrated to Him by the fact that no work was performed upon it. The command not to do any (כּל) work applied to both man and beast without exception. Those who were to rest are divided into two classes by the omission of the cop. ו before עבדּך (Exo 20:10): viz., first, free Israelites ("thou") and their children ("thy son and thy daughter"); and secondly, their slaves (man-servant and maid-servant), and cattle (beasts of draught and burden), and their strangers, i.e., foreign labourers who had settled among the Israelites. "Within thy gates" is equivalent to in the cities, towns, and villages of thy land, not in thy houses (cf. Deu 5:14; Deu 14:21, etc.). שׁער (a gate) is only applied to the entrances to towns, or large enclosed courts and palaces, never to the entrances into ordinary houses, huts, and tents. מלאכה work (cf. Gen 2:2), as distinguished from עבדה labour, is not so much a term denoting a lighter…

All things being prepared for the solemn promulgation of the divine law, we have, in this chapter, I. The ten commandments, as God himself spoke them upon mount Sinai (v. 1-17), as remarkable a portion of scripture as any in the Old Testament. II. The impressions made upon the people thereby (Exo 20:18-21). III. Some particular instructions which God gave privately to Moses, to be by him communicated to the people, relating to his worship (Exo 20:22, etc.).

20:8-11 The Sabbath day is kept holy when it is dedicated to the Lord (20:10). Whatever belongs exclusively to God shares his character. This is not to say that the other six days are unholy, but simply that they are for ordinary work (20:9). On this day set apart, we are reminded that it is not our work that supplies our needs. Our needs are supplied by God as an act of his grace (20:6).