Romans 9:25-26

As indeed he says in Hosea, Those who were no people of mine, I will call 'my People,' and her 'beloved' who was not beloved;

Romans 10:19

Then, I ask, "Did Israel not understand?" Why, first of all Moses declares, I will make you jealous of a nation that is no nation, I will provoke you to anger over a nation devoid of understanding.

Romans 11:6-7

Selected by grace, and therefore not for anything they have done; otherwise grace would cease to be grace.

Romans 11:30

Once you disobeyed God, and now you enjoy his mercy thanks to their disobedience; in the same way they at present are disobedient,

1 Corinthians 7:25

I have no orders from the Lord for unmarried women, but I will give you the opinion of one whom you can trust, after all the Lord's mercy to him.

1 Timothy 1:13

though I had formerly been a blasphemer and a persecutor and a wanton aggressor. I obtained mercy because in my unbelief I had acted out of ignorance;

Hebrews 4:16

So let us approach the throne of grace with confidence, that we may receive mercy and find grace to help us in the hour of need.

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
As indeed he says in Hosea, Those who were no people of mine, I will call 'my People,' and her 'beloved' who was not beloved;

Obtained

Romans 11:6
Selected by grace, and therefore not for anything they have done; otherwise grace would cease to be grace.
1 Corinthians 7:25
I have no orders from the Lord for unmarried women, but I will give you the opinion of one whom you can trust, after all the Lord's mercy to him.
1 Timothy 1:13
though I had formerly been a blasphemer and a persecutor and a wanton aggressor. I obtained mercy because in my unbelief I had acted out of ignorance;
Hebrews 4:16
So let us approach the throne of grace with confidence, that we may receive mercy and find grace to help us in the hour of need.

General references

Romans 9:16
You see, it is not a question of human will or effort but of the divine mercy.