13 "If you turn back your foot from the Sabbath, from doing your pleasure on my holy day, and call the Sabbath a delight and the holy day of the LORD honorable; if you honor it, not going your own ways, or seeking your own pleasure, or talking idly;
Jeremiah 6:16a Thus says the LORD: "Stand by the roads, and look, and ask for the ancient paths, where the good way is; and walk in it, and find rest for your souls.......
Matthew 11:28 Come to me, all who labor and are heavy laden, and I will give you rest.
27 And he said to them, "The Sabbath was made for man, not man for the Sabbath.
28 So the Son of Man is lord even of the Sabbath."
The sabbath is God's rest pure and simple. It's fulfillment is found in the finished work of Christ and according to Hebrews 3-4 is entered into by faith in Christ and the salvation He has wrought and is made manifest by our having ceased from our efforts of self-justification and self-sanctification. Going to church and/or synagogue once or twice a week was never the intent of the sabbath.Even those with Moses in the wilderness were given a double portion of manna on the sixth day so that there would be no need to leave their dwellings in search of sustenance on the seventh.
God's rest in Christ is to and for the saints. It is part and parcel of the free gift given through Christ.The sabbath serves the saints, not the other way around. Regular, "required", attendance at a "service" is one of the biggest weights/guilt trips we lay upon each other. It is certainly not anymore an evidence of salvation,than running down the aisle and saying the "sinner's prayer".
Hebrews 4:10 for whoever has entered God's rest has also rested from his works as God did from his.
The saints rest in the same finished work that God Himself rested in.
28 Then they said to him, "What must we do, to be doing the works of God?"
29 Jesus answered them, "This is the work of God, that you believe in him whom he has sent."
Isaiah 11:10 And in that day there shall be a root of Jesse, which shall stand for an ensign of the people; to it shall the Gentiles seek: and his rest shall be glorious.