Romans 9:7-8
Neither are all [Jewish] people children [of God], [simply] because they are Abraham's descendants. But [Gen. 21:12 says], "It is through Isaac that you [i.e., Abraham] will have descendants."
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."
2 Corinthians 6:17-18
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."
Galatians 3:26-29
For all of you are children of God through your faith in Christ Jesus [as God's only Son].