Throughout the Old Testament, the Sabbath is always referred to as the seventh day, not the first. Specific instructions are given to us, including rest for all, no buying or selling, and to keep the Sabbath holy. Those who keep the Sabbath, the seventh day, as God has commanded, will be rewarded. Please note the following Old Testament evidence that God commanded His People to keep the Sabbath :
Genesis 2:2-3 ~ God Rested on the Seventh Day and Blessed It
(2) And on the SEVENTH DAY God ended His work which He had made; and He RESTED ON THE SEVENTH DAY from all His work which He had made. (3) 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.
Exodus 16:23-30 ~ Rest on the Sabbath, the Seventh Day
(23) And He said unto them, This is that which the Lord hath said, Tomorrow is the rest of the holy Sabbath unto the Lord. Bake that which ye will bake today, and seethe that ye will seethe; and that which remaineth over lay up for you to be kept until the morning. (24) And they laid it up till the morning, as Moses bade. And it did not stink, neither was there any worm therein. (25) And Moses said, Eat that today; for today is a Sabbath unto the Lord. Today ye shall not find it in the field. (26) Six days ye shall gather it; but on the SEVENTH DAY, which is the Sabbath, in it there shall be none. (27) And it came to pass, that they went out some of the people on the SEVENTH DAY for to gather, and they found none. (28) And the Lord said unto Moses, How long refuse ye to keep My commandments and My laws? (29) See, for that the Lord hath given you the Sabbath, therefore He giveth you on the sixth day the bread of two days; abide ye every man in his place, let no man go out of his place on the SEVENTH DAY (30) So the people rested on the SEVENTH DAY. (31) And the house of Israel called the name thereof Manna. And it was like coriander seed, white; and the taste of it was like wafers made with honey.
Exodus 20:8-11 ~ The 4th Commandment: Honor the Sabbath, the Seventh Day, and Keep It Holy
(8) Remember the Sabbath day, to keep it holy. (9) Six days shalt thou labour, and do all thy work, (10) 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. (11) For in six days the Lord made Heaven and earth, the sea, and all that is in them, and RESTED THE SEVENTH DAY. Wherefore the Lord blessed the Sabbath day, and hallowed it.
Exodus 23:12 ~ The Servants Are Not Allowed To Work on the Sabbath, the Seventh Day
Six days thou shalt do thy work, and on the SEVENTH DAY thou shalt rest. That thine ox and thine ass may rest, and the son of thy handmaid, and the stranger, may be refreshed.
Exodus 34:21 ~ Rest on the Sabbath, the SEVENTH DAY, Even During Harvest Time
Six days thou shalt work, but on the seventh day thou shalt rest. In earing time and in harvest thou shalt rest.
Leviticus 23:3 ~ The SEVENTH DAY IS THE SABBATH of Rest, a Holy Convocation
Six days shall work be done. But the seventh day is the Sabbath of rest, an holy convocation. Ye shall do no work therein. It is the Sabbath of the Lord in all your dwellings.
Leviticus 26:2-4 ~ Those Who Keep God..s Commandments Are Rewarded
(2) Ye shall keep My Sabbaths, and reverence My sanctuary. I am the Lord. (3) If ye walk in My statutes, and keep My commandments, and do them, (4) then I will give you rain in due season, and the land shall yield her increase, and the trees of the field shall yield their fruit.
Deuteronomy 5:12-15 ~ Obey the 4th Commandment, Honor the Sabbath, the Seventh Day
(12) Keep the Sabbath day to sanctify it, as the Lord thy God hath commanded thee. (13) Six days thou shalt labour, and do all thy work. (14) But the SEVENTH DAY IS THE SABBATH of the Lord thy God. I it thou shalt not do any work, thou, nor thy son, nor thy manservant, nor thy maidservant, nor thine ox, nor thine ass, nor any of thy cattle, nor thy stranger that is within thy gates; that thy manservant and thy maidservant may rest as well as thou. (15) And remember that thou wast a servant in the land of Egypt, and that the Lord thy God brought thee out thence through a mighty hand and by a stretched out arm. Therefore the Lord thy God commanded thee to keep the Sabbath day.
Nehemiah 10:31 ~ No Buying or Selling on the Sabbath
And if the people of the land bring ware or any victuals on the Sabbath day to sell, that we would not buy it of them on the Sabbath, or on the holy day. And that we would leave the seventh year, and the exaction of every debt.
Nehemiah 13:15 ~ No Buying or Selling on the Sabbath
In those days saw I in Judah some treading wine presses on the Sabbath, and bringing in sheaves, and lading asses; as also wine, grapes, and figs, and all manner of burdens, which they brought into Jerusalem on the Sabbath day. And I testified against them in the day wherein they sold victuals.
Isaiah 56:2, 6 ~ Blessed Are All Those, Including Foreigners, Who Keep the Sabbath
(2) Blessed is the man that doeth this, and the son of man that layeth hold on it; that keepeth the Sabbath from polluting it, and keepeth his hand from doing any evil. (6) Also the sons of the stranger, that join themselves to the Lord, to serve Him, and to love the name of the Lord, to be His servants, every one that keepeth the Sabbath from polluting it, and taketh hold of My covenant.
Isaiah 58:13-14 ~ Those Who Keep The Sabbath Are Rewarded
(13) If thou turn away thy foot from the Sabbath, from doing thy pleasure on My holy day; and call the Sabbath a delight, the holy of the Lord, honourable; and shalt honour Him, not doing thine own ways, nor find thine own pleasure, nor speaking thine own words, (14) then shalt thou delight thyself in the Lord; and I will cause thee to ride upon the high places of the earth, and feed thee with the heritage of Jacob thy father. For the mouth of the Lord hath spoken it.
Isaiah 66:23 ~ Worship the Lord on the Sabbath Day
And it shall come to pass, that from one new moon to another, and from one Sabbath to another, shall all flesh come to worship before Me, saith the Lord.
Jeremiah 17:21-22 ~ Bear No Burdens on the Sabbath Day, But Keep It Holy
(21) Thus saith the Lord: Take heed to yourselves, and bear no burden on the Sabbath, nor bring it in by the gates of Jerusalem. (22) Neither carry forth a burden out of your houses on the Sabbath day, neither do ye any work, but hallow ye the Sabbath day, as I commanded your fathers.
Ezekiel 20:12-13 ~ Punishment for Those Who Do Not Keep God's Commands
(12) Moreover also I gave them My Sabbaths, to be a sign between Me and them, that they might know that I am the Lord that sanctify them. (13) But the house of Israel rebelled against Me in the wilderness. They walked not in My statutes, and they despised My judgments, which if a man do, he shall even live in them; and My Sabbaths they greatly polluted. Then I said, I would pour out My fury upon them in the wilderness, to consume them.
Ezekiel 20:19-20 ~ Keeping God..s Statutes Is a Sign Between God and You
(19) I am the Lord your God. Walk in My statutes, and keep My judgments, and do them. (20) And hallow My Sabbaths, and they shall be a sign between Me and you, that ye may know that I am the Lord your God.