And the shalom rest mentioned in Hebrews?
Context: Understand who he is writing to and why.
The WEB says this:
Hebrews 4:9 There remains therefore a Sabbath rest for the people of God.
10 For he who has entered into his rest has himself also rested from his works, as God did from his.
The author is writing to Christians with a Jewish background. They are discouraged because of persecution, and some of them are tempted to go back to the Temple, back to Judaism. That is the basic background of the book. Thus throughout there is the contrast of the two systems: one
better than the other.
The Sabbath has been done away with. The Sabbath day was a day of rest.
We have a "better" Sabbath--a "Sabbath rest" for the people of God.
Those who have entered into His rest have rested from his works.
Jesus said come unto me all ye that labor and I will give you rest.
The rest that he gives to those that believe in him is permanent.
It does not belong to one day--the Sabbath--it is every day; every minute, as we rest in Christ. He is our rest.