1 Peter 2:10

At one time you [Gentiles] were not a [chosen] people, but now you are God's [special] people. Once you had not received [His] mercy, but now you have received it.

Romans 9:25-26

God said this also, in Hosea [2:23], "I [i.e., God] will call those people mine who were not [previously] my people. And [I will call] her 'dearly loved' who was not [previously] loved."

Romans 10:19

But I ask [again], "Did not the Israelites understand [the message]?" In the first place, Moses said [Deut. 32:21], "I [i.e., God] will stir up you [Jews] to become jealous, by [favoring] a nation [i.e., the Gentiles] that is unworthy [of your approval]. [I will do it] by using a nation of fools to make you people angry."

Romans 11:6-7

And if [they were selected] by God's unearned favor, [then] the choice is not based on the good that people may do. Otherwise, God's favor would not be [really] unearned.

Romans 11:30

For you Gentiles were disobedient to God in the past, but now you have obtained [God's] mercy by means of the disobedience of the Jews.

1 Corinthians 7:25

Now I have no command from the Lord concerning [what you wrote about] unmarried women. [Note: The word here is "virgins" but some think it includes both males and females]. But I give my advice as someone who has received the Lord's mercy to be counted trustworthy.

1 Timothy 1:13

[even] though I had previously spoken against Christ, and persecuted [Christians] and acted outrageously. However, I obtained mercy because I acted out of ignorance, not believing [in Christ].

Hebrews 4:16

So, we should approach, with confidence, God's throne of unearned favor, so we can receive mercy and obtain that favor to help us when we need it.

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
God said this also, in Hosea [2:23], "I [i.e., God] will call those people mine who were not [previously] my people. And [I will call] her 'dearly loved' who was not [previously] loved."

Obtained

Romans 11:6
And if [they were selected] by God's unearned favor, [then] the choice is not based on the good that people may do. Otherwise, God's favor would not be [really] unearned.
1 Corinthians 7:25
Now I have no command from the Lord concerning [what you wrote about] unmarried women. [Note: The word here is "virgins" but some think it includes both males and females]. But I give my advice as someone who has received the Lord's mercy to be counted trustworthy.
1 Timothy 1:13
[even] though I had previously spoken against Christ, and persecuted [Christians] and acted outrageously. However, I obtained mercy because I acted out of ignorance, not believing [in Christ].
Hebrews 4:16
So, we should approach, with confidence, God's throne of unearned favor, so we can receive mercy and obtain that favor to help us when we need it.

General references

Romans 9:16
So then, it does not depend on what a person wants or does, but on God, who shows pity [i.e., to whomever He wants].