Mahabharata 12.57.19
अभृतानां भवेद्भर्ता भृतानां चान्ववेक्षकःनृपतिः सुमुखश्च स्यात्स्मितपूर्वाभिभाषिता
abhṛtānāṃ bhavedbhartā bhṛtānāṃ cānvavekṣakaḥnṛpatiḥ sumukhaśca syātsmitapūrvābhibhāṣitā
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book