Shiva Purana
मंत्रविप्रत्वमापद्य पश्चाच्छुद्धो भवेद्द्विजः । नारीवाथ नरो वाथ ब्राह्मणो वान्य एव वा १२८ ।
Having attained the status of a mantra-brāhmaṇa through the chanting of mantras, one becomes pure and is then considered a dvija (twice-born). Whether one is a woman, a man, or a brāhmaṇa, it applies to anyone.
english translation
maMtravipratvamApadya pazcAcchuddho bhaveddvijaH । nArIvAtha naro vAtha brAhmaNo vAnya eva vA 128 ।
hk transliteration by Sanscript