That a woman ought not to be adorned in a worldly fashion
In the Apocalypse: “And there came one of the seven angels having vials, and approached me, saying, Come, I will show you the condemnation of the great whore, who sits upon many waters, with whom the kings of the earth have committed fornication. And I saw a woman who sate upon a beast. And that woman was clothed with a purple and scarlet robe; and she was adorned with gold, and precious stones, and pearls, holding a golden cup in her hand full of curses, and impurity, and fornication of the whole earth.” Also to Timothy: “Let your women be such as adorn themselves with shamefacedness and modesty, not with twisted hair, nor with gold, nor with pearls, or precious garments, but as becomes women professing chastity, with a good conversation.” Of this same thing in the Epistle of Peter to the people at Pontus: “Let there be in a woman not the outward adorning of ornament, or of gold, or of apparel, but the adorning of the heart.” Also in Genesis: “Thamar covered herself with a cloak, and adorned herself; and when Judah beheld her, she appeared to him to be a harlot.”
Source: The Treatises of Cyprian (New Advent)