Romans 4:11-12
And he received the outward sign of circumcision as a seal of the righteousness of the faith which he had while he was uncircumcised; that he might be the father of all the uncircumcised who have faith, so that righteousness might be put to their account also;
Matthew 22:32
"I am the God of Abraham, and the God of Isaac, and the God of Jacob"? He is not a God of the dead, but of the living.
Romans 11:25
For I would not have you ignorant, brethren, of this mystery, lest ye should be wise in your own conceits, that blindness hath to some extent come upon Israel, until the fullness of the gentiles shall have come in.
Galatians 3:29
and if ye belong to Christ, then are ye Abrahams offspring, heirs according to the promise.