Galatians 3:7
"Know ye therefore that they which are of faith, the same are the children of Abraham."
Cross References (ranked by relevance)
So then they which be of faith are blessed with faithful Abraham.
But for us also, to whom it shall be imputed, if we believe on him that raised up Jesus our Lord from the dead;
Know ye that the LORD he is God: it is he that hath made us, and not we ourselves; we are his people, and the sheep of his pasture.
They answered and said unto him, Abraham is our father. Jesus saith unto them, If ye were Abraham’s children, ye would do the works of Abraham.
And Jesus said unto him, This day is salvation come to this house, forsomuch as he also is a son of Abraham.