1 Corinthians 11:9
''The man was not created for the woman, but the woman for the man.''

Mark 2:27
''The Sabbath was made for man. And not man for the Sabbath.''
king James Version

Genesis 2:2-3
''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. And he blessed the Seventh day, and Santified it: because in it he had rested from all his work which he created and made.''
King James Version

Notice: the Bible says God ''Santified'' the Seveth day...
What does the word Santified mean?

The word ''Santified'' in the Orignal Hebrew is ''qadash'' (verb) - which means: ''to be holy, a state wherin people or things are set aside for worship of God, set aside for God.''

The bible is Clear the Seventh day was set aside for God... all the way back in Creation. Before there was any Jew or Gentile, before there was any division of Nations or languages.

Even back in Old testament times ''the Sabbath'' was to be kept by every one who worship the true God...
Whether you they were A Seed of Abraham [Jews]
OR A Stranger
[a person who is not a Jew]
NOTICE - What the Prophet Isaiah records.

Isaiah 56:2-7
''Blessed is the man that doeth this, and on the son of man that layeth hold on it; that keepth the Sabbath from polluting it, and keepeth his hand from doing any evil. Neither let the son of the stranger, that have join himself to the LORD, speak. saying, the LORD hath utterly seperated me from his people; neither let the eunuch say, Behold i am a dry tree. 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; 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 the an everlasting name, that shall not be cut off. Also the sons of the stranger, that join themselves to the LORD, to serve him, to love 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; Even them will i bring to my holy mountain, and make the joyful in my house of prayer their sacrifies shall be excepted upon mine altar; for mine house shall be called an house of prayer for ALL PEOPLE.''
King James Version