In the Ten Commandments, God gave a command regarding the Sabbath (Exodus 20-8-10). Israel was to work for six days and rest on the seventh day. God gave this command specifically to the Jews and did not carry it over to the Gentiles in the church age. Again, the Ten Commandments would have had to be given on our Sunday for Saturday to be the seventh day of rest.
Those who teach that the Ten Commandments are not part of the Mosaic law should note that Paul declared, “I had not known sin, but by the law: for I had not know lust, except the law had said, Thou shalt not covet” (Romans 7:7). this quotation comes from the Ten Commandments, which Paul called the law. Paul declared us to be dead to the law (Romans 7:1-7). He also stated that we are now under grace (Romans 6:14; Galatians 3:1-29).