Hebrews 5 keeping the Sabbath?

[mystic]

There remains, then, a Sabbath-rest for the people of God; 10 for anyone who enters God’s rest also rests from their works, just as God did from his. 11 Let us, therefore, make every effort to enter that rest, so that no one will perish by following their example of disobedience. 12 For the word of God is alive and active.

Was this instructing the Gentiles to keep the Sabbath?

[alon]

Dec 2, 2020 4:25:12 GMT -8 mystic said:

There remains, then, a Sabbath-rest for the people of God; 10 for anyone who enters God’s rest also rests from their works, just as God did from his. 11 Let us, therefore, make every effort to enter that rest, so that no one will perish by following their example of disobedience. 12 For the word of God is alive and active.

Was this instructing the Gentiles to keep the Sabbath?

Your passage is actually found in Hebrews 4:

Hebrews 4:9-12 (ESV) So then, there remains a Sabbath rest for the people of God, for whoever has entered God's rest has also rested from his works as God did from his. Let us therefore strive to enter that rest, so that no one may fall by the same sort of disobedience. For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart.

While Torah applies to all men, the book of Hebrews was written as an encouragement to new Hebrew believers in Yeshua as ha'Moshiach. While this doesn't mean the book does not apply to Gentiles coming into the faith, it just was not primarily written to them. So I guess the answer to your question is then "yes and no." 

"Yes," it applies to all men, Gentiles included.
"No," it was written to believers, Hebrew believers in particular who had placed their trust in Yeshua as their Messiah.

Dan C