Srimad-Bhagavatam: Canto 5 - Chapter 1 - Verse 15
Sanskrit:
इलावृते तु भगवान् भव एक एव पुमान्न ह्यन्यस्तत्रापरो निर्विशति भवान्या: शापनिमित्तज्ञो यत्प्रवेक्ष्यत: स्त्रीभावस्तत्पश्चाद्वक्ष्यामि ॥ १५ ॥
ITRANS:
ilāvṛte tu bhagavān bhava eka eva pumān na hy anyas tatrāparo nirviśati bhavānyāḥ śāpa-nimitta-jño yat-pravekṣyataḥ strī-bhāvas tat paścād vakṣyāmi.
Translation:
Śukadeva Gosvāmī said: In the tract of land known as Ilāvṛta-varṣa, the only male person is Lord Śiva, the most powerful demigod. Goddess Durgā, the wife of Lord Śiva, does not like any man to enter that land. If any foolish man dares to do so, she immediately turns him into a woman. I shall explain this later [in the Ninth Canto of Śrīmad-Bhāgavatam].