[So] then, a Sabbath “rest day” [still] remains for God’s people [i.e., for Christians, in heaven].
There remaineth therefore a rest to the people of God.
So then, there is still awaiting a full and complete Sabbath-rest reserved for the [true] people of God;
There remaineth therefore a sabbath rest for the people of God.
So you see that a sabbath rest is left open for God’s people.
And so, there remains a Sabbath of rest for the people of God.
There remaineth therefore a day of rest for the people of God.