Mahabharata 3.127.12

सोमक उवाच · somaka uvāca

धिगस्त्विहैकपुत्रत्वमपुत्रत्वं वरं भवेत्नित्यातुरत्वाद्भूतानां शोक एवैकपुत्रता

dhigastvihaikaputratvamaputratvaṃ varaṃ bhavetnityāturatvādbhūtānāṃ śoka evaikaputratā

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