If the sabbath was given to man at creation…
Are you saying it wasn’t given at creation?
Genesis 2
1Thus the heavens and the earth were finished, and all the host of them.
2And 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.
3And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.
Ex.20
10But the seventh day is the sabbath of the LORD thy God:
why is there no record of it being kept by people before moses?
Why do you think this should be some sort of criteria for not keeping the Sabbath?
Genesis 26:5
Because that Abraham obeyed my voice, and kept my charge, my commandments, my statutes, and my laws.
Gen4
6And the LORD said unto Cain, Why art thou wroth? and why is thy countenance fallen?
7If thou doest well, shalt thou not be accepted? and if thou doest not well,
sin lieth at the door. And unto thee shall be his desire, and thou shalt rule over him.
1 John 3:4
4Whosoever committeth sin transgresseth also the law: for
sin is the transgression of the law.
To “rest” is to cease… thats what the word sabbath literally means. There is no record that God ended his rest and returned to “work”.
Why is this of any significance at all?
Why does commandment list the reason for sabbath observance as creation in exodus… for deliverance from Egypt in Deuteronomy? Why two different versions of this “immutable” “eternal” law that is so detailed it specifies a particular day of the week that is superior than others?
Just speculation. But I believe that God wanted to emphasise that He is not only our creator, but our Savior. The day is superior because God blessed it. See Gen.2:3 above
another question… if Saturday is the only proper day to fulfill the command to set aside time for rest and worship… How can you kn ow for sure which slice of time God recognizes as "Saturday’?
The bible tells us.
Luke 23
52This man went unto Pilate, and begged the body of Jesus.
53And he took it down, and wrapped it in linen, and laid it in a sepulchre that was hewn in stone, wherein never man before was laid.
54And that day was the preparation, and the sabbath drew on.
55And the women also, which came with him from Galilee, followed after, and beheld the sepulchre, and how his body was laid.
56And they returned, and prepared spices and ointments; and rested the sabbath day according to the commandment.
Luke 24
1Now upon the first day of the week, very early in the morning, they came unto the sepulchre, bringing the spices which they had prepared, and certain others with them.
Jesus dies on the Preperation day, Friday, the women saw where he was laid returned “and rested the sabbath day according to the commandment.” They came back and finished thier work on the first day, Sunday. Not only does this tell us that the Sabbath is between the preperation day (Friday), and the first day (Sunday), but it also tells us that the commandment had not been changed at Jesus death.
Heb.9
16For where a testament is, there must also of necessity be the death of the testator.
17For a testament is of force after men are dead: otherwise it is of no strength at all while the testator liveth.
Gal.3
15Brethren, I speak after the manner of men; Though it be but a man’s covenant, yet if it be confirmed, no man disannulleth, or addeth thereto.
The covenant was confirmed by the blood of Christ and can not be changed.
And as these vs.testify a testament can only be changed when the testator lives. After His death it is written in stone, so to speak.