Mahabharata 12.210.13

तस्माच्चतुष्टयं वेद्यमेतैर्हेतुभिराचितम्यथासंज्ञो ह्ययं सम्यगन्तकाले न मुह्यति

tasmāccatuṣṭayaṃ vedyametairhetubhirācitamyathāsaṃjño hyayaṃ samyagantakāle na muhyati

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