Ephesians 3:6

[it is this:] that the Gentiles are now joint heirs [with the Jews] and members of the same body, and joint partakers [sharing] in the [same divine] promise in Christ Jesus through [their faith in] the good news [of salvation].

Galatians 3:14

in order that in Christ Jesus the blessing of Abraham might also come to the Gentiles, so that we would all receive [the realization of] the promise of the [Holy] Spirit through faith.

Romans 8:15-17

For you have not received a spirit of slavery leading again to fear [of God’s judgment], but you have received the Spirit of adoption as sons [the Spirit producing sonship] by which we [joyfully] cry, “Abba! Father!”

Romans 12:4-5

For just as in one [physical] body we have many parts, and these parts do not all have the same function or special use,

1 Corinthians 12:12

For just as the body is one and yet has many parts, and all the parts, though many, form [only] one body, so it is with Christ.

1 Corinthians 12:27

Now you [collectively] are Christ’s body, and individually [you are] members of it [each with his own special purpose and function].

Galatians 4:5-7

so that He might redeem and liberate those who were under the Law, that we [who believe] might be adopted as sons [as God’s children with all rights as fully grown members of a family].

Ephesians 2:13-22

But now [at this very moment] in Christ Jesus you who once were [so very] far away [from God] have been brought near by the blood of Christ.

Ephesians 4:15-16

But speaking the truth in love [in all things—both our speech and our lives expressing His truth], let us grow up in all things into Him [following His example] who is the Head—Christ.

Ephesians 5:7

So do not participate or even associate with them [in the rebelliousness of sin].

Ephesians 5:30

because we are members (parts) of His body.

Colossians 2:19

and not holding fast to the head [of the body, Jesus Christ], from whom the entire body, supplied and knit together by its joints and ligaments, grows with the growth [that can come only] from God.

1 John 1:3

what we have seen and heard we also proclaim to you, so that you too may have fellowship [as partners] with us. And indeed our fellowship [which is a distinguishing mark of born-again believers] is with the Father, and with His Son Jesus Christ.

1 John 2:25

This is the promise which He Himself promised us—eternal life.

Galatians 3:26-29

For you [who are born-again have been reborn from above—spiritually transformed, renewed, sanctified and] are all children of God [set apart for His purpose with full rights and privileges] through faith in Christ Jesus.

Treasury of Scripture Knowledge

Summary

That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel:

Bible References

The same

Ephesians 4:15
But speaking the truth in love [in all things—both our speech and our lives expressing His truth], let us grow up in all things into Him [following His example] who is the Head—Christ.
Ephesians 5:30
because we are members (parts) of His body.
Romans 12:4
For just as in one [physical] body we have many parts, and these parts do not all have the same function or special use,
1 Corinthians 12:12
For just as the body is one and yet has many parts, and all the parts, though many, form [only] one body, so it is with Christ.
Colossians 2:19
and not holding fast to the head [of the body, Jesus Christ], from whom the entire body, supplied and knit together by its joints and ligaments, grows with the growth [that can come only] from God.

General references

Isaiah 19:23
In that day there will be a highway from Egypt to Assyria, and the Assyrians will come into Egypt and the Egyptians into Assyria; and the Egyptians will worship and serve [the Lord] with the Assyrians.
Luke 13:29
And people will come from east and west, and from north and south, and they will sit down [and feast at the table] in the kingdom of God.
Romans 3:29
Or is God the God of Jews only? Is He not also the God of Gentiles [who were not given the Law]? Yes, of Gentiles also,
Philippians 1:5
[thanking God] for your participation and partnership [both your comforting fellowship and gracious contributions] in [advancing] the good news [regarding salvation] from the first day [you heard it] until now.