Galatians 3:7; Galatians 4:24; Galatians 6:12

7 Know ye therefore that they which are of faith, the same are the children of Abraham.
24 Which things are an allegory : for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar.
12 As many as desire to make a fair shew in the flesh, they constrain you to be circumcised ; only lest they should suffer persecution for the cross of Christ.