Mahabharata 12.306.68

अबुध्यमानां प्रकृतिं बुध्यते पञ्चविंशकःन तु बुध्यति गन्धर्व प्रकृतिः पञ्चविंशकम्

abudhyamānāṃ prakṛtiṃ budhyate pañcaviṃśakaḥna tu budhyati gandharva prakṛtiḥ pañcaviṃśakam

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