"Thus the heavens and the earth were finished, and all the host of them.... And God blessed the seventh day, and sanctified it: because that in it He had rested from all His work which God created and made." Gen. 2:1-3. To sanctify is "to set apart," and so the day made holy and blessed by God was set apart for man. Then it was, as Jesus said, that "the Sabbath was made for man." Mark 2:27. Here the Sabbath institution was planted at the beginning of the world. _At the Exodus._--The people of Israel, in their bondage in Egypt, had fallen away from the knowledge of God and become corrupted by the idolatrous worship of Egypt, Hence, as the Lord called them out to be His people, He tested their loyalty to His law by observing how they regarded His holy Sabbath: "Then said the Lord unto Moses, Behold, I will rain bread from heaven for you; and the people shall go out and gather a certain rate every day, that I may prove them, whether they will walk in My law, or no." Ex. 16:4. So through the forty years the Lord sent the manna for them to gather on the six working days, withholding it on the Sabbath. (This scripture shows also that the Sabbath was a part of God's law before He spoke it from Sinai.) [Illustration: HOREB, THE SACRED MOUNT A modern view of the summit of Mt. Sinai.] _At Sinai._--When the time came that the Lord would speak His holy law from heaven, the eternal foundation of His moral government, the Sabbath precept was enshrined in the heart of it: "Remember the Sabbath day, to keep it holy. Six days shalt thou labor, and do all thy work: but the seventh day is the Sabbath of the Lord thy God: in it thou shalt not do any work, thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy stranger that is within thy gates: for in six days the Lord made heaven and earth, the sea, and all that in them is, and rested the seventh day: wherefore the Lord blessed the Sabbath day, and hallowed it." Ex. 20:8-11. _Through Israel's History._--Sabbath keeping was the great mark of loyalty to God. When Israel fell into idolatry, they "observed times" (see 2 Kings 21:6),--doubtless such heathen festivals to the sun god and other deities as were common among the idolatrous nations. These observances of other days meant Sabbath breaking. "Neither shall ye ... observe times.... Ye shall keep My Sabbaths." Lev. 19:26-30. The Lord had promised concerning Jerusalem: "If ye diligently hearken unto Me, saith the Lord, to bring in no burden through the gates of this city on the Sabbath day, but hallow the Sabbath day, to do no work therein; then shall there enter into the gates of this city kings and princes sitting upon the throne of David,... and this city shall remain forever." Jer. 17:24, 25. The divine pleading was slighted, and Jerusalem's fall and the Babylonian captivity came as the result of the Israelites' disregard of God's holy day.