Devibhagavatapurana 3.30.9

3.30.9

pūrvajanmani vaidehī muniputrī tapasvinī |
rāvaṇena vane dṛṣṭā tapasyantī śucismitā ||

O Râghava! The Devî Jânakî, in her previous birth, was the daughter of a Muni and practised asceticism. While engaged in her austerities, in her holy hermitage, Râvana came and looking at her, prayed that beautiful woman to become his wife. Hearing this, she gave a good reproach to Râvana, when he perforce caught hold of her hairs. That ascetic woman got very angry, and, considering her body polluted by the devil’s contact, resolved to put an end to her life and cursed Râvana, thus:-- “O Villain! I will be born on the surface of the earth, not from any womb but simply for your destruction and ruin.” Thus saying, she parted with her life.