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What is the purpose?
That being said, the 10 commandments are the core commandments in a Covenant granted to the Jews.
Matthew 19:18-19 (NIV)
“Which ones?” he inquired. Jesus replied, “ ‘You shall not murder, you shall not commit adultery, you shall not steal, you shall not give false testimony,
honor your father and mother,’ and ‘love your neighbor as yourself.’”
Jesus didn't skip Sabbath by a mistake. His words are teachings effective in our New Covenant, and with the Jewish Sabbath excluded. In the New Covenant, there's no longer the Law. We rely on faith to be saved instead of our works such as observing Sabbath. All left is we need to follow Jesus Christ teachings and to be Jesus-like.