Romans 9:27

And Isaiah declares about [the nation of] Israel [Isa. 10:22-23], "[Even] if the number of Israelites were [as many] as the grains of sand in the ocean, [still only] a small minority will be saved.

Romans 11:26

And so [i.e., in this way] all the Israelites will be saved. [Note: The "all" here is thought by many to refer to a large number of the physical Jews who will be saved, not necessarily to every single individual Jew]. Even as it is written [Isa. 59:20-21], "The Deliverer [i.e., Christ] will come from Zion [i.e., the city of Jerusalem, or from the nation of Israel]. He will take away the wickedness from Jacob [i.e., the Jews]."

2 Thessalonians 2:13-14

But we ought to thank God for you always, brothers [who are] dearly loved by the Lord, because God has chosen you from the beginning [Note: Some manuscripts use the Greek word for "firstfruits" instead of "beginning" here, but it is difficult to know in what sense the Thessalonian Christians were "first"], in order to be saved through being set apart by the Holy Spirit and through belief of the truth [of the Gospel].

John 4:22

You [Samaritans] do not [really] know what you worship; we [Jews] know what we worship because salvation is from the Jews [i.e., through Jewish prophets, Jewish Scriptures and a Jewish Messiah].

John 10:16

I have other sheep [also] which are not [presently] in this corral; I must lead them, too. They will hear my voice and become one flock [i.e., with the others], having one shepherd. [Note: This probably refers to believing Gentiles becoming God's people, along with the Jews].

Acts 2:20-21

[In that day] the sun will become dark and the moon will [appear] as blood. [This will all happen] before the great and wonderful day when the Lord comes. [Note: Some view these last two verses as a reference to events occurring at the end of time. See Matt. 24:29-30].

Acts 2:39

For the promise [of forgiveness and the Holy Spirit] is being given to you [Jews] and to your descendants and [also] to all those who are far away [i.e., Gentiles. See Eph. 2:17]. [This promise is] to as many as [respond to] the Lord, our God's call [through the Gospel, See II Thess. 2:14]."

Acts 15:17

so that the rest of mankind, including all the Gentiles [or nations], may seek after the Lord and be called by my name.

Romans 8:28-30

And we know that God works out everything for the good of those who love Him and are called [to serve Him] in harmony with His purpose [for them].

Romans 9:24

We were these people, whom He called, not only from the Jews but also from the Gentiles.

Romans 10:11-14

For the Scripture says [Isa. 28:16], "Whoever believes in Him [i.e., Christ] will not be put to shame." [i.e., he will never have unforgiven sin brought up against him]

Romans 11:5

So, now also, there is a small minority which has been selected by God's unearned favor [i.e., to be saved].

Romans 11:7

What then? [Just this]: The very thing that the Israelites are looking for [i.e., a right relationship with God], they have not found. But God's selected ones obtained [this right relationship with Him] and the rest [of the Israelites] were made insensitive to God's call,

1 Corinthians 1:2

[it is being sent] to the church of God at Corinth. [You people are] set apart in [the fellowship of] Christ Jesus and called [by God] to be saints [i.e., His holy people], along with all [others] everywhere who call on our Lord Jesus Christ [i.e., in prayer]. He is their Lord and ours [as well].

Hebrews 12:22

But you [Christians] have come to Mount Zion, to the heavenly Jerusalem, the city of the living God. [Note: These terms describe people who have entered a spiritual relationship with God as part of the church]. [You have come] to a praise gathering of innumerable angels [Note: Christians are here pictured as assembled in worship of God, along with angels],

Treasury of Scripture Knowledge

Summary

And it shall come to pass, that whosoever shall call on the name of the LORD shall be delivered: for in mount Zion and in Jerusalem shall be deliverance, as the LORD hath said, and in the remnant whom the LORD shall call.

Bible References

That ps 50

Acts 2:21
And the time will come when every person who calls on the name of the Lord will be saved' [i.e., whoever appeals to God through obedient faith in Christ].
Romans 10:11
For the Scripture says [Isa. 28:16], "Whoever believes in Him [i.e., Christ] will not be put to shame." [i.e., he will never have unforgiven sin brought up against him]
1 Corinthians 1:2
[it is being sent] to the church of God at Corinth. [You people are] set apart in [the fellowship of] Christ Jesus and called [by God] to be saints [i.e., His holy people], along with all [others] everywhere who call on our Lord Jesus Christ [i.e., in prayer]. He is their Lord and ours [as well].

For

John 4:22
You [Samaritans] do not [really] know what you worship; we [Jews] know what we worship because salvation is from the Jews [i.e., through Jewish prophets, Jewish Scriptures and a Jewish Messiah].
Romans 11:26
And so [i.e., in this way] all the Israelites will be saved. [Note: The "all" here is thought by many to refer to a large number of the physical Jews who will be saved, not necessarily to every single individual Jew]. Even as it is written [Isa. 59:20-21], "The Deliverer [i.e., Christ] will come from Zion [i.e., the city of Jerusalem, or from the nation of Israel]. He will take away the wickedness from Jacob [i.e., the Jews]."
Hebrews 12:22
But you [Christians] have come to Mount Zion, to the heavenly Jerusalem, the city of the living God. [Note: These terms describe people who have entered a spiritual relationship with God as part of the church]. [You have come] to a praise gathering of innumerable angels [Note: Christians are here pictured as assembled in worship of God, along with angels],

And in

John 10:16
I have other sheep [also] which are not [presently] in this corral; I must lead them, too. They will hear my voice and become one flock [i.e., with the others], having one shepherd. [Note: This probably refers to believing Gentiles becoming God's people, along with the Jews].
Acts 2:39
For the promise [of forgiveness and the Holy Spirit] is being given to you [Jews] and to your descendants and [also] to all those who are far away [i.e., Gentiles. See Eph. 2:17]. [This promise is] to as many as [respond to] the Lord, our God's call [through the Gospel, See II Thess. 2:14]."
Acts 15:17
so that the rest of mankind, including all the Gentiles [or nations], may seek after the Lord and be called by my name.
Romans 8:28
And we know that God works out everything for the good of those who love Him and are called [to serve Him] in harmony with His purpose [for them].
Romans 9:24
We were these people, whom He called, not only from the Jews but also from the Gentiles.
Romans 11:5
So, now also, there is a small minority which has been selected by God's unearned favor [i.e., to be saved].
2 Thessalonians 2:13
But we ought to thank God for you always, brothers [who are] dearly loved by the Lord, because God has chosen you from the beginning [Note: Some manuscripts use the Greek word for "firstfruits" instead of "beginning" here, but it is difficult to know in what sense the Thessalonian Christians were "first"], in order to be saved through being set apart by the Holy Spirit and through belief of the truth [of the Gospel].