1 Peter 2:10

you who were once "no people" but are now "God's people"; once "unpitied" but now "pitied indeed."

Romans 9:25-26

Just as he says in Hosea, "I will call a people that was not mine, my people, And her who was not beloved, my beloved,

Romans 10:19

But I ask again, did Israel fail to understand? Why, to begin with, Moses said, "I will make you jealous of what is no nation at all, I will exasperate you at a senseless nation."

Romans 11:6-7

But if it is by his mercy, it is not for anything they have done. Otherwise, his mercy would not be mercy at all.

Romans 11:30

For just as you once disobeyed God, but now have had mercy shown you because they disobeyed,

1 Corinthians 7:25

About unmarried women I have no command of the Lord to give you, but I will give you my opinion as that of one on whom through the Lord's mercy you can depend.

1 Timothy 1:13

though I once used to abuse, persecute, and insult him. But he had mercy on me, because I had acted in ignorance and unbelief,

Hebrews 4:16

So let us come with courage to God's throne of grace to receive his forgiveness and find him responsive when we need his help.

Treasury of Scripture Knowledge

Summary

Which in time past were not a people, but are now the people of God: which had not obtained mercy, but now have obtained mercy.

General references

Bible References

Were

Romans 9:25
Just as he says in Hosea, "I will call a people that was not mine, my people, And her who was not beloved, my beloved,

Obtained

Romans 11:6
But if it is by his mercy, it is not for anything they have done. Otherwise, his mercy would not be mercy at all.
1 Corinthians 7:25
About unmarried women I have no command of the Lord to give you, but I will give you my opinion as that of one on whom through the Lord's mercy you can depend.
1 Timothy 1:13
though I once used to abuse, persecute, and insult him. But he had mercy on me, because I had acted in ignorance and unbelief,
Hebrews 4:16
So let us come with courage to God's throne of grace to receive his forgiveness and find him responsive when we need his help.

General references

Romans 9:16
So it depends not on human will or exertion, but on the mercy of God.