Romans 4:12
And he also became the father of circumcised people [i.e., the Jews], who are not only circumcised, but who also follow the [same] example of faith [in God] which our forefather Abraham had before he was circumcised.
Matthew 3:9
and quit thinking to yourselves, we claim Abraham as our forefather, because I tell you, God is able to make Abraham's children out of these stones.
Luke 16:23-31
And in the unseen place of departed spirits the rich man, who was being tormented, looked up and saw Abraham far away, with Lazarus close beside him.
John 8:39-40
They answered Him, "Our forefather was Abraham." Jesus replied to them, "If you were Abraham's descendants, you would do the [kinds of] deeds that Abraham did.
Romans 9:6-7
But it is not as if the word of God [i.e., His promise to Israel] has failed [in its fulfillment]. For not all those descended from the Israelites are [truly] Israelites [i.e., God's people].
2 Corinthians 12:18
I urged Titus [i.e., to go to you to arrange for the special offering. See 8:6], and I sent the brother with him. [See 8:18]. Did Titus take any [financial] advantage of you? Do we not [both] have the same attitude [in this matter]? Do we not [both] follow the same procedures?
Galatians 4:22-31
For it is written in the law about Abraham's two sons [Gen. 16]; one [was] by his slave woman [Hagar] and the other by the free woman, [his wife, Sarah].
1 Peter 2:21
[After all], this is what you were called to do, because Christ also suffered for you, leaving you an example, so that you would follow in His steps.