Genesis 2:1-3 Authorized (King James) Version (AKJV)
2 Thus the heavens and the earth were finished, and all the host of them. 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.
Which part of this tells you to keep sabbath?
Sabbath was introduced to Israel in Exodus.
Exodus 31:16-17King James Version (KJV)
16 Wherefore the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations, for a perpetual covenant.
17 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.
How many Jews were there in Gen 2:1-3? There's nothing like general duty when it comes to obedience to God's express commandments. Otherwise a person who rapes altar boys can claim he has generally not committed adultery.
You want to inherit all of Israel's promises, their God and their Messiah but when it comes to the fourth commandment you are not a Jew?
Isaiah 56
56 Thus saith the Lord, Keep ye judgment, and do justice: for my salvation is near to come, and my righteousness to be revealed.
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.
3 Neither let
the son of the stranger, that hath joined himself to the Lord, speak, saying, The Lord hath utterly separated me from his people: neither let the eunuch say, Behold, I am a dry tree.
4 For thus saith the Lord
unto the eunuchs that keep my sabbaths, and choose the things that please me, and take hold of my covenant; 5 Even unto them will I give in mine house and within my walls a place and a name better than of sons and of daughters: I will give them an everlasting name, that shall not be cut off.
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; 7 Even them will I bring to my holy mountain, and make them joyful in my house of prayer: their burnt offerings and their sacrifices shall be accepted upon mine altar;
for mine house shall be called an house of prayer for all people. 8 The Lord God, which gathereth the outcasts of Israel saith, Yet will I gather others to him, beside those that are gathered unto him.
Isaiah 58
12 And they that shall be of thee shall build the old waste places: thou shalt raise up the foundations of many generations; and thou shalt be called, The repairer of the breach, The restorer of paths to dwell in.
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 finding 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.
Colossians 3:11
Where there is neither Greek nor Jew, circumcision nor uncircumcision, Barbarian, Scythian, bond nor free: but Christ is all, and in all.
Galatians 3:28
There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus.