Hebrews 4:6

So, since it still remains for some people to enter into that rest, but those to whom the good news was previously proclaimed [See verse 2] failed to enter it because of disobedience [See 3:18]

Hebrews 3:18-19

And to whom did God vow that they would not enter a state of rest with Him? [Was it not] those who were disobedient to Him?

Matthew 21:43

Therefore I tell you, the kingdom of God will be taken from you [Jews] and will be given to a nation [i.e., the Gentiles] that will produce the fruit of the kingdom.

Matthew 22:9-10

Now go to the main crossroads of the highways and invite everyone you find there to the wedding reception.'

Luke 14:21-24

Then the slave returned and told his master about these things. Then the master of the house became angry and said to his slave, 'Go out quickly into the streets and alleys of the town and bring people who are poor, and handicapped, and blind and crippled in here [i.e., to the supper].'

Acts 13:46-47

But Paul and Barnabas [continued to] speak out boldly, saying, "It was necessary that the message of God be delivered to you [Jews] first. But since you have rejected it and [thereby] consider yourselves to be unworthy of [receiving] never ending life, we [i.e., Paul and Barnabas] will now begin proclaiming it to the [unconverted] Gentiles.

Acts 28:28

Then let it be known to you that salvation from God is [now] being announced to the Gentiles. They will listen [to it]." {{Some ancient manuscripts insert verse

1 Corinthians 7:29

But I say this, brothers; there is not much time left [i.e., before the crisis arrives in full fury. See verse 26]. From now on those men who are married should live as though they were single.

Galatians 3:8

And, predicting that God would consider the Gentiles right with Him by [their] faith, the Scriptures previously recorded [this promise of] the Gospel to Abraham by saying [Gen. 12:3], "All nations will receive a blessing through your descendant [i.e., Jesus]."

Hebrews 4:2

For we [Christians] have had the good news [about resting with God] preached to us, just as the Israelites [had good news proclaimed to them. See 1:16-19]. But the message they heard did not benefit them, because it was not coupled with faith by those who heard it.

Hebrews 4:9

[So] then, a Sabbath "rest day" [still] remains for God's people [i.e., for Christians, in heaven].

Treasury of Scripture Knowledge

Summary

Seeing therefore it remaineth that some must enter therein, and they to whom it was first preached entered not in because of unbelief:

Entered

General references

Bible References

It remaineth

Hebrews 4:9
[So] then, a Sabbath "rest day" [still] remains for God's people [i.e., for Christians, in heaven].
1 Corinthians 7:29
But I say this, brothers; there is not much time left [i.e., before the crisis arrives in full fury. See verse 26]. From now on those men who are married should live as though they were single.

Some

Matthew 21:43
Therefore I tell you, the kingdom of God will be taken from you [Jews] and will be given to a nation [i.e., the Gentiles] that will produce the fruit of the kingdom.
Matthew 22:9
Now go to the main crossroads of the highways and invite everyone you find there to the wedding reception.'
Luke 14:21
Then the slave returned and told his master about these things. Then the master of the house became angry and said to his slave, 'Go out quickly into the streets and alleys of the town and bring people who are poor, and handicapped, and blind and crippled in here [i.e., to the supper].'
Acts 13:46
But Paul and Barnabas [continued to] speak out boldly, saying, "It was necessary that the message of God be delivered to you [Jews] first. But since you have rejected it and [thereby] consider yourselves to be unworthy of [receiving] never ending life, we [i.e., Paul and Barnabas] will now begin proclaiming it to the [unconverted] Gentiles.
Acts 28:28
Then let it be known to you that salvation from God is [now] being announced to the Gentiles. They will listen [to it]." {{Some ancient manuscripts insert verse

They

Hebrews 4:2
For we [Christians] have had the good news [about resting with God] preached to us, just as the Israelites [had good news proclaimed to them. See 1:16-19]. But the message they heard did not benefit them, because it was not coupled with faith by those who heard it.
Hebrews 3:19
And [so] we see that they were not able to enter [a state of rest with God] because of [their] unbelief.
Galatians 3:8
And, predicting that God would consider the Gentiles right with Him by [their] faith, the Scriptures previously recorded [this promise of] the Gospel to Abraham by saying [Gen. 12:3], "All nations will receive a blessing through your descendant [i.e., Jesus]."

Entered

Hebrews 3:18
And to whom did God vow that they would not enter a state of rest with Him? [Was it not] those who were disobedient to Him?

General references

Matthew 13:58
So, He did not perform very many supernatural deeds in that place because of the people's lack of faith.