Mahabharata 14.19.33

प्रचिन्त्यावसथं कृत्स्नं यस्मिन्कायेऽवतिष्ठतेतस्मिन्काये मनश्चार्यं न कथंचन बाह्यतः

pracintyāvasathaṃ kṛtsnaṃ yasminkāye'vatiṣṭhatetasminkāye manaścāryaṃ na kathaṃcana bāhyataḥ

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