John 8:39

39 “Abraham is our father,” they answered. “If you were Abraham’s children,” said Jesus, “then you would a do what Abraham did.

Read John 8:39 Using Other Translations

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.
They answered him, "Abraham is our father." Jesus said to them, "If you were Abraham's children, you would be doing the works Abraham did,
“Our father is Abraham!” they declared. “No,” Jesus replied, “for if you were really the children of Abraham, you would follow his example.