Mahabharata 5.107.20

अत्र निर्याणकालेषु तमः संप्राप्यते महत्अभेद्यं भास्करेणापि स्वयं वा कृष्णवर्त्मना

atra niryāṇakāleṣu tamaḥ saṃprāpyate mahatabhedyaṃ bhāskareṇāpi svayaṃ vā kṛṣṇavartmanā

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