Does Hebrews 4:9 remove the obligation of the Sabbath Rest day?-No
Scripture nowhere even hints at the idea that entering into His rest replaces the Sabbath Day of Creation.
It is important to note that this “Sabbath Rest” is the same rest which was offered to the children of Israel as it was to the Gentiles, quite simply because it is the same Gospel which was preached to them, as it is to us, for it is the Gospel of Grace.
“Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.” Hebrews 4:16
“For as the new heavens and the new earth, which I will make, shall remain before me, saith the LORD, so shall your seed and your name remain. And it shall come to pass, that from one new moon to another, and from one sabbath to another, shall all flesh come to worship before me, saith the LORD.” Isaiah 66:22-23
Christ is our rest-as He is the door which all must enter “while it is called to-day.” (Heb 3:13)
The rest which is spoken of in Hebrews is the very same rest which is spoken of by Jesus when He says.
“Come unto Me, all ye that labour, and are heavy laden, and I will give you rest. Take My yoke upon you, and learn of Me; for I am meek and lowly in heart; and ye shall find rest unto your souls. For My yoke is easy, and My burden is light.” (Matthew 11:28-30)
So, should we not accept it?
“for we are made partakers of Christ, if we hold the beginning of our confidence steadfast unto the end. (Heb 3:14)”
“For thus saith the Lord God, the Holy One of Israel; In returning and rest shall ye be saved; in quietness and in confidence shall be your strength. (Isaiah 30:15)
It is Hebrews 3 and 4 which speaks of the rest that comes from faith in Jesus, therefore we should go first to those verses to find the meaning of that rest.
This rest which is ours was also offered to the people of Israel in old times, but they came short of it, not because it was not offered to them, but because when the Gospel was preached to them they did not believe; the Gospel that is preached to us now, is the very same Gospel that was preached to them. (Heb 4:2)
“For unto us was the gospel preached, as well as unto them: but the word preached did not profit them, not being mixed with faith in them that heard it.” Heb 4:2
This rest is already prepared for us, for “we which have believed do enter into rest, as He said, as I have sworn in My wrath, If they shall enter into My rest.” (Hebrews 4:3)
God has sworn by Himself, that the seed of Abraham–that is ALL who have faith in Jesus–should enter into rest; and that was equivalent to an oath, that they who did not believe should not enter in, and therefore God did indeed swear, that the faithless ones should not enter in.
This was no arbitrary decree, but a statement of fact, for it is as impossible for an unbelieving person to enter into rest, as it would be for a man to live and grow strong without eating, drinking, or breathing.
The fact that “they could not enter in because of unbelief” shows that they would have entered in, if they had believed; and the fact that perfect rest was already prepared for them, is still further shown by the statement, “the works were finished from the foundation of the world.” (Hebrews 4:3)
You see, up to the time of his fall, Adam had enjoyed perfect rest in the Lord while laboring in the field.
Why?–Because his work was simply to “keep” that perfect work which God had prepared for him and committed to him.
“This is the work of God, that ye believe.” (John 6:29)
It is simply belief, or faith in Him which gives rest, but nowhere is it even hinted at that this rest removes the obligation of the Sabbath day.
Adam’s work simply consisted in keeping the faith. He was not required to create anything, nor could he if he had to; it was the Lord that did the creating, which allowed Adam to enter His rest.
But this does not remove the Sabbath, for the Sabbath was instituted in the garden before sin placed a curse upon mankind.
It was instituted at creation before the fall, and it comprises one day of the creation week, and it should be noted that it is the seventh day of creation, not the day after creation. It was the only day which was hallowed and sanctified, and it will be instituted in the new earth for all who are accepted into His rest.