Mahabharata 12.271.38

शतं सहस्राणि ततश्चरित्वा; प्राप्नोति वर्णं हरितं तु पश्चात्स चैव तस्मिन्निवसत्यनीशो; युगक्षये तमसा संवृतात्मा

śataṃ sahasrāṇi tataścaritvā; prāpnoti varṇaṃ haritaṃ tu paścātsa caiva tasminnivasatyanīśo; yugakṣaye tamasā saṃvṛtātmā

Our plain-language meaning of this verse is waiting for scholar review.