as Sarah obeyed Abraham, calling him lord, whose children you now are, if you do well, and are not put in fear by any terror.
Whose daughters ye are; meaning not by natural descent, though they were, these being Jews the apostle writes to, but by grace, and in a spiritual sense; just as those are the children of Abraham, who walk in the steps of his faith, whether they be Jews or Gentiles; so such are the daughters of Sarah, the children of the free woman, who imitate her in faith and obedience; that is, they appear, and are declared to be so: