there remains a Sabbath rest reserved for God's people

This can be stated in active form. Alternate translation: "there is still a Sabbath rest that God has reserved for his people" (See: [[rc://en/ta/man/translate/figs-activepassive]])

# a Sabbath rest

Eternal peace and security are spoken of as if they were the Sabbath day, the Jewish day of worship and rest from working. Alternate translation: "an eternal rest" (See: [[rc://en/ta/man/translate/figs-metaphor]])