I Peter 3:2-6

when they observe your chaste conduct accompanied by fear. Do not let your adornment be merely outward—arranging the hair, wearing gold, or putting on fine apparel— rather let it be the hidden person of the heart, with the incorruptible beauty of a gentle and quiet spirit, which is very precious in the sight of God. For in this manner, in former times, the holy women who trusted in God also adorned themselves, being submissive to their own husbands, as Sarah obeyed Abraham, calling him lord, whose daughters you are if you do good and are not afraid with any terror.