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.
And are not put in fear by any terror ... The sentiment here is that of  Proverbs 3:25, which seems to have been a chapter that Peter was very familiar with; for he quoted it again in  1 Peter 5:5.  "Peter is apparently thinking of some attempt (by a pagan husband perhaps?) to scare a woman out of her Christian faith."[8] Justin Martyr relates the narrative of a certain woman who accepted Christianity and turned from a wicked and dissolute life, but whose husband continued stubbornly in the old ways; and after prolonged abuse, and even abandonment, she legally divorced him. However, her husband, being restrained by a court order from harming his wife, persecuted to death her Christian teacher.[9]