There remaineth therefore a rest to the people of God. Heb4:9
That does not state what you wrote it states.
Don't get me wrong here, I believe what is stated in nine of the ten commandments are applicable to believers, Paul wrote that law is holy, just and good. Rom7:12. However, if people make blanket statements of: You must obey the ten commandments, in the real world, people would then live their christian lives under righteousness of obeying the law, as I did when I was young. Obey the law you remain justified before God, fail to obey it you lose your justification.
It states there is a Sabbath rest for the people of God as opposed to what you seem to be stating which is "there is not a Sabbath for the people of God." So the evidence, based on Acts, and other parts of the New Testament, there is still a Sabbath rest. It was kept in the New Covenant by Christians. Hebrews 4:9 states it clearly.