Well, in reality, Heb 4:9 is looking forward to the time of Isa 66:23...
Isa 66:23 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.
Not just those called today...
Rom 9:24 Even us, whom he hath called, not of the Jews only, but also of the Gentiles?
But in the time of Isa 66, ALL FLESH will come before God on the saventh day, the day He set apart (sanctified) and made holy (hallowed) to worship Him. They will also keep the Feast Days...
Zec 14:16 And it shall come to pass, that every one that is left of all the nations which came against Jerusalem shall even go up from year to year to worship the King, the LORD of hosts, and to keep the feast of tabernacles.
God is serious about this...
Zec 14:17 And it shall be, that whoso will not come up of all the families of the earth unto Jerusalem to worship the King, the LORD of hosts, even upon them shall be no rain.
Zec 14:18 And if the family of Egypt go not up, and come not, that have no rain; there shall be the plague, wherewith the LORD will smite the heathen that come not up to keep the feast of tabernacles.
Zec 14:19 This shall be the punishment of Egypt, and the punishment of all nations that come not up to keep the feast of tabernacles.
You mean to tell me that God will cause little children and the elderly and all the rest to go hungry and suffer from plagues for NOT keeping the Feast of Tabernacles? Well, what do you read here?
But we know from Revelation that these prophecies are figurative, not literal.
How is it we know that these are figurative? I take much of Isaiah's writings as literal. I really believe that there is coming a day when this will happen...
Isa 2:2 And it shall come to pass in the last days, that the mountain of the LORD'S house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it.
Isa 2:3 And many people shall go and say, Come ye, and let us go up to the mountain of the LORD, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths: for out of Zion shall go forth the law, and the word of the LORD from Jerusalem.
Isa 2:4 And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more.
Isa 11:1 And there shall come forth a rod out of the stem of Jesse, and a Branch shall grow out of his roots:
Isa 11:2 And the spirit of the LORD shall rest upon him, the spirit of wisdom and understanding, the spirit of counsel and might, the spirit of knowledge and of the fear of the LORD;
Isa 11:3 And shall make him of quick understanding in the fear of the LORD: and he shall not judge after the sight of his eyes, neither reprove after the hearing of his ears:
Isa 11:4 But with righteousness shall he judge the poor, and reprove with equity for the meek of the earth: and he shall smite the earth with the rod of his mouth, and with the breath of his lips shall he slay the wicked.
Isa 11:5 And righteousness shall be the girdle of his loins, and faithfulness the girdle of his reins.
Isa 11:6 The wolf also shall dwell with the lamb, and the leopard shall lie down with the kid; and the calf and the young lion and the fatling together; and a little child shall lead them.
Isa 11:7 And the cow and the bear shall feed; their young ones shall lie down together: and the lion shall eat straw like the ox.
Isa 11:8 And the sucking child shall play on the hole of the asp, and the weaned child shall put his hand on the cockatrice' den.
Isa 11:9 They shall not hurt nor destroy in all my holy mountain: for the earth shall be full of the knowledge of the LORD, as the waters cover the sea.
Isa 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.
Isa 35:1 The wilderness and the solitary place shall be glad for them; and the desert shall rejoice, and blossom as the rose.
Isa 35:2 It shall blossom abundantly, and rejoice even with joy and singing: the glory of Lebanon shall be given unto it, the excellency of Carmel and Sharon, they shall see the glory of the LORD, and the excellency of our God.
Isa 35:3 Strengthen ye the weak hands, and confirm the feeble knees.
Isa 35:4 Say to them that are of a fearful heart, Be strong, fear not: behold, your God will come with vengeance, even God with a recompence; he will come and save you.
Isa 35:5 Then the eyes of the blind shall be opened, and the ears of the deaf shall be unstopped.
Isa 35:6 Then shall the lame man leap as an hart, and the tongue of the dumb sing: for in the wilderness shall waters break out, and streams in the desert.
Isa 35:7 And the parched ground shall become a pool, and the thirsty land springs of water: in the habitation of dragons, where each lay, shall be grass with reeds and rushes.
Isa 35:8 And an highway shall be there, and a way, and it shall be called The way of holiness; the unclean shall not pass over it; but it shall be for those: the wayfaring men, though fools, shall not err therein.
Isa 35:9 No lion shall be there, nor any ravenous beast shall go up thereon, it shall not be found there; but the redeemed shall walk there:
Isa 35:10 And the ransomed of the LORD shall return, and come to Zion with songs and everlasting joy upon their heads: they shall obtain joy and gladness, and sorrow and sighing shall flee away.
Eze 37:15 The word of the LORD came again unto me, saying,
Eze 37:16 Moreover, thou son of man, take thee one stick, and write upon it, For Judah, and for the children of Israel his companions: then take another stick, and write upon it, For Joseph, the stick of Ephraim, and for all the house of Israel his companions:
Eze 37:17 And join them one to another into one stick; and they shall become one in thine hand.
Eze 37:18 And when the children of thy people shall speak unto thee, saying, Wilt thou not shew us what thou meanest by these?
Eze 37:19 Say unto them, Thus saith the Lord GOD; Behold, I will take the stick of Joseph, which is in the hand of Ephraim, and the tribes of Israel his fellows, and will put them with him, even with the stick of Judah, and make them one stick, and they shall be one in mine hand.
Eze 37:20 And the sticks whereon thou writest shall be in thine hand before their eyes.
Eze 37:21 And say unto them, Thus saith the Lord GOD; Behold, I will take the children of Israel from among the heathen, whither they be gone, and will gather them on every side, and bring them into their own land:
Eze 37:22 And I will make them one nation in the land upon the mountains of Israel; and one king shall be king to them all: and they shall be no more two nations, neither shall they be divided into two kingdoms any more at all:
Eze 37:23 Neither shall they defile themselves any more with their idols, nor with their detestable things, nor with any of their transgressions: but I will save them out of all their dwellingplaces, wherein they have sinned, and will cleanse them: so shall they be my people, and I will be their God.
Eze 37:24 And David my servant shall be king over them; and they all shall have one shepherd: they shall also walk in my judgments, and observe my statutes, and do them.
Eze 37:25 And they shall dwell in the land that I have given unto Jacob my servant, wherein your fathers have dwelt; and they shall dwell therein, even they, and their children, and their children's children for ever: and my servant David shall be their prince for ever.
Eze 37:26 Moreover I will make a covenant of peace with them; it shall be an everlasting covenant with them: and I will place them, and multiply them, and will set my sanctuary in the midst of them for evermore.
Eze 37:27 My tabernacle also shall be with them: yea, I will be their God, and they shall be my people.
Eze 37:28 And the heathen shall know that I the LORD do sanctify Israel, when my sanctuary shall be in the midst of them for evermore.
Just to name a few.