Mahabharata 12.9.17

न चाप्यवहसन्कंचिन्न कुर्वन्भ्रुकुटीं क्वचित्प्रसन्नवदनो नित्यं सर्वेन्द्रियसुसंयतः

na cāpyavahasankaṃcinna kurvanbhrukuṭīṃ kvacitprasannavadano nityaṃ sarvendriyasusaṃyataḥ

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