Mahabharata 3.218.20

शक्र उवाच · śakra uvāca

यदि सत्यमिदं वाक्यं निश्चयाद्भाषितं त्वयायदि वा शासनं स्कन्द कर्तुमिच्छसि मे शृणु

yadi satyamidaṃ vākyaṃ niścayādbhāṣitaṃ tvayāyadi vā śāsanaṃ skanda kartumicchasi me śṛṇu

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