OET interlinear 1 PET 3:6

uW Translation Notes:

Note 1 topic: figures-of-speech / idiom

ἧς ἐγενήθητε τέκνα

˱of˲_whom ˱you_all˲_˓were˒_become children

Peter uses a Hebrew idiom here in which people are said to be the children of someone who has qualities similar to theirs. Women who believe and who act like Sarah acted are thought of as if they were her actual children. If this might confuse your readers, you could express the meaning plainly or use a simile. Alternate translation: [who resemble her as if you were her children]

Note 2 topic: figures-of-speech / doublenegatives

μὴ φοβούμεναι μηδεμίαν πτόησιν

(Some words not found in SR-GNT: ὡς Σάρρα ὑπήκουσεν τῷ Ἀβραάμ Κύριον αὐτόν καλοῦσα ἧς ἐγενήθητε τέκνα ἀγαθοποιοῦσαι καί μή φοβούμεναι μηδεμίαν πτόησιν)

The phrase not being afraid of any translates two negative words in Greek. Peter uses them together to emphasize that believing women should not fear anything at all. If your language can use two negatives together for emphasis without them cancelling each other to create a positive meaning, it would be appropriate to use that construction here.