And on the seventh day God ended His work which He had done, and He rested on the seventh day from all His work which He had done. Genesis 2:2, NKJV.
God sanctified and blessed the day in which He had rested from all His wondrous work. And this Sabbath, sanctified of God, was to be kept for a perpetual covenant. It was a memorial that was to stand from age to age, till the close of earth's history.
God brought the Hebrews out of their Egyptian bondage, and commanded them to observe His Sabbath, and keep the law given in Eden. Every week He worked a miracle to establish in their minds the fact that in the beginning of the world He had instituted the Sabbath....
In the third month they came to the desert of Sinai, and there the law was spoken from the mount in awful grandeur. During their stay in Egypt, Israel had so long heard and seen idolatry practiced that to a large degree they had lost their knowledge of God and of His law, and their sense of the importance and sacredness of the Sabbath; the law was given a second time to call these things to their remembrance. In God's statutes was defined practical religion for all mankind. Before Israel was placed the true standard of righteousness.
“And the Lord spake unto Moses, saying, Speak thou also unto the children of Israel, saying, Verily my sabbaths ye shall keep.” Some, who have been anxious to make of none effect the law of God, have quoted this word “sabbaths,” interpreting it to mean the annual sabbaths of the Jews. But they do not connect this positive requirement with that which follows: “For it is a sign between me and you throughout your generations; that ye may know that I am the Lord that doth sanctify you. Ye shall keep the sabbath therefore; for it is holy unto you: every one that defileth it shall surely be put to death: for whosoever doeth any work therein, that soul shall be cut off from among his people. Six days may work be done; but in the seventh is the sabbath of rest, holy to the Lord: whosoever doeth any work in the sabbath day, he shall surely be put to death. Wherefore the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations, for a perpetual covenant. It is a sign between me and the children of Israel for ever: for in six days the Lord made heaven and earth, and on the seventh day he rested, and was refreshed.”—The Review and Herald, August 30, 1898.
From To Be Like Jesus - Page 132