Acts 21:24
take these men and purify yourself along with them and pay their expenses, so that they may shave their heads. Thus all will know that there is nothing in what they have been told about you, but that you yourself live in observance of the law.
Romans 11:7-10
What then? Israel did not obtain what it sought. The elect obtained it, but the rest were hardened,
Romans 11:25
I do not want you to be ignorant of this mystery, brothers, so that you may not be conceited: Israel has experienced a hardening in part until the full number of the Gentiles has come in.
2 Corinthians 4:3-4
And even if our gospel is veiled, it is veiled to those who are perishing.