Mahabharata 5.142.25

योऽसौ कानीनगर्भो मे पुत्रवत्परिवर्तितःकस्मान्न कुर्याद्वचनं पथ्यं भ्रातृहितं तथा

yo'sau kānīnagarbho me putravatparivartitaḥkasmānna kuryādvacanaṃ pathyaṃ bhrātṛhitaṃ tathā

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