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.

 The Greek for for sins is either huper ( G5228) or peri ( G4012) hamartion ( G266) . It so happens that in the Greek version of the Old Testament the regular phrase for a sin-offering is peri ( G4012) hamartias ( G266) (Hamartias, G266, is the singular of hamartion, G266) , as, for instance, in Leviticus 5:7 and Leviticus 6:30. That is to say, Peter is laying it down that the death of Christ is the sacrifice which atones for the sin of men. 