Mahabharata 1.77.26

तस्मिन्समागमे सुभ्रूः शर्मिष्ठा चारुहासिनीलेभे गर्भं प्रथमतस्तस्मान्नृपतिसत्तमात्

tasminsamāgame subhrūḥ śarmiṣṭhā cāruhāsinīlebhe garbhaṃ prathamatastasmānnṛpatisattamāt

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