Mahabharata 7.53.56
यथा प्रभातां रजनीं कल्पितः स्याद्रथो ममतथा कार्यं त्वया कृष्ण कार्यं हि महदुद्यतम्
yathā prabhātāṃ rajanīṃ kalpitaḥ syādratho mamatathā kāryaṃ tvayā kṛṣṇa kāryaṃ hi mahadudyatam
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book