Mahabharata 12.308.13

राजा तस्याः परं दृष्ट्वा सौकुमार्यं वपुस्तथाकेयं कस्य कुतो वेति बभूवागतविस्मयः

rājā tasyāḥ paraṃ dṛṣṭvā saukumāryaṃ vapustathākeyaṃ kasya kuto veti babhūvāgatavismayaḥ

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