Romans 15:8-10
For I tell you that Christ was [appointed] to be a servant of the circumcised ones [i.e., the Jews], in order to uphold the truth of God. This was so He could confirm [as valid] the promises made to our forefathers,
2 Corinthians 6:17
Therefore, the Lord says [Isa. 52:11], "You people should leave their company [i.e., unbelievers, verse 14] and separate yourselves from them, and do not touch anything unclean [i.e., their evil practices], and I will welcome you."
Ephesians 2:12-14
[Remember] that you were at that time without Christ; [you were] excluded from citizenship in the nation of Israel; [you were] foreigners regarding the Agreements of [God's] promises. You had no hope and were without God in the world.
Titus 2:14
He gave Himself up for us, to buy us back from [enslavement to] all [kinds of] wickedness and to purify for Himself a group of people who belong to Him and who are eager to do good deeds.
1 Peter 2:9
But you people are especially chosen [by God]; you are a royal body of priests; you are a nation especially set apart for God's use; you are a people who belong exclusively to God, that you may express the virtues of the One who called you out of darkness [i.e., of sin and error], and into His marvelous light [i.e., righteousness and truth].